chore(deps): Bump wpt from 406d8b9 to 6b0e6d9 (#3009)

Bumps [wpt](https://github.com/web-platform-tests/wpt) from `406d8b9` to
`6b0e6d9`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/6b0e6d909fbc8f74309827a287a61373e285ee74"><code>6b0e6d9</code></a>
Make :has-slotted apply to flattened nodes</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/6446dd4f8c90404812cee247c69da6a1ce91fd6d"><code>6446dd4</code></a>
fix and annotate known sanitizer api failures</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/cfcf3b9ae4211f2cf44fc1049d3fcf31d9f6fcc6"><code>cfcf3b9</code></a>
[<a href="https://github.com/container"><code>@​container</code></a>]
scroll-state(scrollable) tests for body element</li>
<li>See full diff in <a
href="https://github.com/web-platform-tests/wpt/compare/406d8b92d77b08efd039bb3374cc38ead4138651...6b0e6d909fbc8f74309827a287a61373e285ee74">compare
view</a></li>
</ul>
</details>
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Author: dependabot[bot]