Bump rdoc from 6.7.0 to 6.8.0 (#4075)

Bumps [rdoc](https://github.com/ruby/rdoc) from 6.7.0 to 6.8.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/ruby/rdoc/releases">rdoc's
releases</a>.</em></p>
<blockquote>
<h2>v6.8.0</h2>
<!-- raw HTML omitted -->
<h2>What's Changed</h2>
<h3>✨ Enhancements</h3>
<ul>
<li>Require space between hash/content in ATX heading by <a
href="https://github.com/skipkayhil"><code>@​skipkayhil</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1140">ruby/rdoc#1140</a></li>
<li>Add new ruby parser that uses Prism by <a
href="https://github.com/tompng"><code>@​tompng</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1144">ruby/rdoc#1144</a></li>
<li>Add support for mobile screen sizes on Darkfish by <a
href="https://github.com/MatheusRich"><code>@​MatheusRich</code></a> in
<a
href="https://redirect.github.com/ruby/rdoc/pull/1025">ruby/rdoc#1025</a></li>
<li>Modernize RDoc Darkfish template CSS by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1157">ruby/rdoc#1157</a></li>
<li>Use pointer cursor for navigation toggle by <a
href="https://github.com/omegahm"><code>@​omegahm</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1175">ruby/rdoc#1175</a></li>
<li>Add home page link to output message by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1165">ruby/rdoc#1165</a></li>
<li>Improve method source toggling by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1176">ruby/rdoc#1176</a></li>
<li>Make methods and attributes linkable by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1189">ruby/rdoc#1189</a></li>
<li>Add support for meta tags by <a
href="https://github.com/vinistock"><code>@​vinistock</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1091">ruby/rdoc#1091</a></li>
<li>Add scroll-margin-top on all :target elements by <a
href="https://github.com/omegahm"><code>@​omegahm</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1174">ruby/rdoc#1174</a></li>
<li>Use scroll-margin-top on anchor targets by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1190">ruby/rdoc#1190</a></li>
<li>feature: Render mixed-in methods and constants with
<code>--embed-mixins</code> by <a
href="https://github.com/flavorjones"><code>@​flavorjones</code></a> in
<a
href="https://redirect.github.com/ruby/rdoc/pull/842">ruby/rdoc#842</a></li>
<li>Red-based darkfish color scheme by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1191">ruby/rdoc#1191</a></li>
<li>Use thicker fonts with high contrast to improve readability by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1197">ruby/rdoc#1197</a></li>
<li>Display class ancestors in the sidebar by <a
href="https://github.com/alexisbernard"><code>@​alexisbernard</code></a>
in <a
href="https://redirect.github.com/ruby/rdoc/pull/1183">ruby/rdoc#1183</a></li>
<li>Split list of class and instance methods in two by <a
href="https://github.com/alexisbernard"><code>@​alexisbernard</code></a>
in <a
href="https://redirect.github.com/ruby/rdoc/pull/1206">ruby/rdoc#1206</a></li>
</ul>
<h3>🐛 Bug Fixes</h3>
<ul>
<li>Abort with error message if <code>--dump</code> argument invalid by
<a href="https://github.com/adam12"><code>@​adam12</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1104">ruby/rdoc#1104</a></li>
<li>Fix darkfish responsiveness issue on screens between 1024px and
~1650px by <a href="https://github.com/st0012"><code>@​st0012</code></a>
in <a
href="https://redirect.github.com/ruby/rdoc/pull/1148">ruby/rdoc#1148</a></li>
<li>Fix sidebar scroll and footer display by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1152">ruby/rdoc#1152</a></li>
<li>Fix sidebar scroll again and add missing footer back by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1154">ruby/rdoc#1154</a></li>
<li>Make summary triangle appear in correct place when summary text
overflows to next line by <a
href="https://github.com/paracycle"><code>@​paracycle</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1160">ruby/rdoc#1160</a></li>
<li>Make darkfish more responsive and readable on mobile devices by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1162">ruby/rdoc#1162</a></li>
<li>Only let browser search through source code until it's expanded by
<a href="https://github.com/Earlopain"><code>@​Earlopain</code></a> in
<a
href="https://redirect.github.com/ruby/rdoc/pull/1181">ruby/rdoc#1181</a></li>
<li>Fix ToRdoc#accept_table by <a
href="https://github.com/tompng"><code>@​tompng</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1184">ruby/rdoc#1184</a></li>
<li>Extract excerpt from RDoc::Markup::Document (raw pages) correctly by
<a href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1200">ruby/rdoc#1200</a></li>
</ul>
<h3>📚 Documentation</h3>
<ul>
<li>[DOC] New file RI.md by <a
href="https://github.com/BurdetteLamar"><code>@​BurdetteLamar</code></a>
in <a
href="https://redirect.github.com/ruby/rdoc/pull/1100">ruby/rdoc#1100</a></li>
<li>[DOC] Mods about markup formats by <a
href="https://github.com/BurdetteLamar"><code>@​BurdetteLamar</code></a>
in <a
href="https://redirect.github.com/ruby/rdoc/pull/1143">ruby/rdoc#1143</a></li>
<li>[doc] Mention <code>.document</code> file in README by <a
href="https://github.com/okuramasafumi"><code>@​okuramasafumi</code></a>
in <a
href="https://redirect.github.com/ruby/rdoc/pull/1153">ruby/rdoc#1153</a></li>
<li>[DOC] Fix links by <a
href="https://github.com/BurdetteLamar"><code>@​BurdetteLamar</code></a>
in <a
href="https://redirect.github.com/ruby/rdoc/pull/1169">ruby/rdoc#1169</a></li>
<li>Improve RDoc pages heading levels order by <a
href="https://github.com/antoinem"><code>@​antoinem</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1185">ruby/rdoc#1185</a></li>
<li>Mention community-maintained themes by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1198">ruby/rdoc#1198</a></li>
</ul>
<h3>🛠 Other Changes</h3>
<ul>
<li>Bump ruby/setup-ruby from 1.176.0 to 1.177.1 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1112">ruby/rdoc#1112</a></li>
<li>Bump ruby/setup-ruby from 1.177.1 to 1.179.0 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1116">ruby/rdoc#1116</a></li>
<li>Bump ruby/setup-ruby from 1.179.0 to 1.179.1 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1120">ruby/rdoc#1120</a></li>
<li>Bump ruby/setup-ruby from 1.179.1 to 1.180.0 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1121">ruby/rdoc#1121</a></li>
<li>Add ruby-core CI suite by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1115">ruby/rdoc#1115</a></li>
<li>Bump ruby/setup-ruby from 1.152.0 to 1.180.1 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1124">ruby/rdoc#1124</a></li>
<li>Fix some typos by <a
href="https://github.com/ydah"><code>@​ydah</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1129">ruby/rdoc#1129</a></li>
<li>Bump ruby/setup-ruby from 1.180.1 to 1.183.0 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1131">ruby/rdoc#1131</a></li>
<li>Group code object files into the same directory by <a
href="https://github.com/st0012"><code>@​st0012</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1114">ruby/rdoc#1114</a></li>
<li>chore(bin): Add <code>bin/console</code> for better DX by <a
href="https://github.com/okuramasafumi"><code>@​okuramasafumi</code></a>
in <a
href="https://redirect.github.com/ruby/rdoc/pull/1132">ruby/rdoc#1132</a></li>
<li>Drop reimplementation of Ripper lex state by <a
href="https://github.com/nevans"><code>@​nevans</code></a> in <a
href="https://redirect.github.com/ruby/rdoc/pull/1118">ruby/rdoc#1118</a></li>
</ul>
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</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ruby/rdoc/commit/cf09b2ebb8cbf6aa8d77b00c705ae20a96e3b482"><code>cf09b2e</code></a>
Bump up v6.8.0</li>
<li><a
href="https://github.com/ruby/rdoc/commit/c6c09638c4834f1052ceb24c6087cc650f42c4ce"><code>c6c0963</code></a>
Enabled trusted publisher for rubygems.org</li>
<li><a
href="https://github.com/ruby/rdoc/commit/3c678249e2cac623c75b7ec2099b0e786aa11bec"><code>3c67824</code></a>
Extract excerpt from raw pages correctly (<a
href="https://redirect.github.com/ruby/rdoc/issues/1200">#1200</a>)</li>
<li><a
href="https://github.com/ruby/rdoc/commit/68525676407102753e63de33b987fe069d3e6625"><code>6852567</code></a>
Split list of class and instance methods in two (<a
href="https://redirect.github.com/ruby/rdoc/issues/1206">#1206</a>)</li>
<li><a
href="https://github.com/ruby/rdoc/commit/50dda134261fd12852eea0ff0eb53bdc15cfe31f"><code>50dda13</code></a>
Display class ancestors in the sidebar <a
href="https://redirect.github.com/ruby/rdoc/issues/1183">#1183</a></li>
<li><a
href="https://github.com/ruby/rdoc/commit/d5c6eca687a788c65dc00c82743ea7e75a93a086"><code>d5c6eca</code></a>
Mention community-maintained themes (<a
href="https://redirect.github.com/ruby/rdoc/issues/1198">#1198</a>)</li>
<li><a
href="https://github.com/ruby/rdoc/commit/7fb0e509ec3f16f636b65d82b286594f87b27d46"><code>7fb0e50</code></a>
Use thicker fonts with high contrast to improve readability (<a
href="https://redirect.github.com/ruby/rdoc/issues/1197">#1197</a>)</li>
<li><a
href="https://github.com/ruby/rdoc/commit/d581cc5b8bb7c43738453d8f4f5b9c7da9fc1536"><code>d581cc5</code></a>
Merge pull request <a
href="https://redirect.github.com/ruby/rdoc/issues/1195">#1195</a> from
nobu/details-marker-for-safari</li>
<li><a
href="https://github.com/ruby/rdoc/commit/c6a0a6a0d5298e98e9a10407a204f09f31f7a526"><code>c6a0a6a</code></a>
Remove details markers in HTML documents</li>
<li><a
href="https://github.com/ruby/rdoc/commit/f69dc470acf8b656f9f2c9f0279585982377920e"><code>f69dc47</code></a>
Red-based darkfish color scheme (<a
href="https://redirect.github.com/ruby/rdoc/issues/1191">#1191</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/ruby/rdoc/compare/v6.7.0...v6.8.0">compare
view</a></li>
</ul>
</details>
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Gemfile.lock

@@ -360,7 +360,7 @@ GEM
       ffi (~> 1.0)
     rbs (3.6.1)
       logger
-    rdoc (6.7.0)
+    rdoc (6.8.0)
       psych (>= 4.0.0)
     redis (5.3.0)
       redis-client (>= 0.22.0)