Update roborazzi to v1.21.0 (#1506)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[io.github.takahirom.roborazzi](https://togithub.com/takahirom/roborazzi)
| plugin | minor | `1.20.0` -> `1.21.0` |
|
[io.github.takahirom.roborazzi:roborazzi-junit-rule](https://togithub.com/takahirom/roborazzi)
| dependencies | minor | `1.20.0` -> `1.21.0` |
|
[io.github.takahirom.roborazzi:roborazzi-compose](https://togithub.com/takahirom/roborazzi)
| dependencies | minor | `1.20.0` -> `1.21.0` |
|
[io.github.takahirom.roborazzi:roborazzi](https://togithub.com/takahirom/roborazzi)
| dependencies | minor | `1.20.0` -> `1.21.0` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>takahirom/roborazzi (io.github.takahirom.roborazzi)</summary>

###
[`v1.21.0`](https://togithub.com/takahirom/roborazzi/releases/tag/1.21.0)

[Compare
Source](https://togithub.com/takahirom/roborazzi/compare/1.20.0...1.21.0)

##### Android Studio, IntelliJ IDEA Plugin is coming

The Roborazzi Plugin has been released after the previous release.
Please check it out. The Roborazzi plugin enhances your development
workflow by automatically displaying screenshots related to Roborazzi's
screenshot tests within IntelliJ IDEA. Easily view and verify visual
outputs directly in your IDE, streamlining your testing and development
process.


https://github.com/takahirom/roborazzi/assets/1386930/bd3e8106-1971-4ec4-b764-3f1831999228

https://plugins.jetbrains.com/plugin/24561-roborazzi

##### Now, test report assets are written in the same directory as the
report HTML.

We are using Materialize for the HTML report generated in
build/reports/roborazzi. This causes a [Content Security Policy (CSP)
problem](https://togithub.com/takahirom/roborazzi/issues/295) when using
iframes. As a result, we can't view the report correctly in some
projects. To resolve this, we now save the assets like CSS and JS in the
same directory as the report HTML. Thank you,
[@&#8203;eyedol](https://togithub.com/eyedol), for tackling this
difficult problem. Thank you,
[@&#8203;realdadfish](https://togithub.com/realdadfish), for reporting
this!

##### Bug fix

In the Windows environment, the image path in the report file is not
written correctly. I fixed the path separator to resolve this issue.
Thank you for reporting this,
[@&#8203;ben-gooding-hub](https://togithub.com/ben-gooding-hub).

##### What's Changed

- \[CI] Update actions/checkout digest to
[`a5ac7e5`](https://togithub.com/takahirom/roborazzi/commit/a5ac7e5) by
[@&#8203;renovate](https://togithub.com/renovate) in
[takahirom/roborazzi#384
- \[CI] Update nick-fields/retry action to v2.9.0 by
[@&#8203;renovate](https://togithub.com/renovate) in
[takahirom/roborazzi#357
- \[CI] Update dependency io.ktor:ktor-serialization-kotlinx-xml to
v2.3.11 by [@&#8203;renovate](https://togithub.com/renovate) in
[takahirom/roborazzi#360
- \[Sample] Update dependency androidx.appcompat:appcompat to v1.7.0 by
[@&#8203;renovate](https://togithub.com/renovate) in
[takahirom/roborazzi#394
- \[Idea Plugin] Add Roborazzi Preview prototype to Idea Plugin by
[@&#8203;takahirom](https://togithub.com/takahirom) in
[takahirom/roborazzi#395
- \[Idea Plugin] Add empty Roborazzi idea plugin by
[@&#8203;takahirom](https://togithub.com/takahirom) in
[takahirom/roborazzi#367
- \[Docs] Add faq section about out of memory error by
[@&#8203;sanao1006](https://togithub.com/sanao1006) in
[takahirom/roborazzi#402
- \[Idea Plugin] Fix the issue where the image is not selected as
intended by [@&#8203;takahirom](https://togithub.com/takahirom) in
[takahirom/roborazzi#403
- \[Idea Plugin] Add README section of idea plugin by
[@&#8203;takahirom](https://togithub.com/takahirom) in
[takahirom/roborazzi#405
- \[Internal (compileOnly)] Update dependency
androidx.compose.ui:ui-test to v1.6.8 by
[@&#8203;renovate](https://togithub.com/renovate) in
[takahirom/roborazzi#397
- \[CI] Update actions/checkout digest to
[`692973e`](https://togithub.com/takahirom/roborazzi/commit/692973e) by
[@&#8203;renovate](https://togithub.com/renovate) in
[takahirom/roborazzi#406
- \[Docs] Add robolectric.pixelCopyRenderMode to README by
[@&#8203;takahirom](https://togithub.com/takahirom) in
[takahirom/roborazzi#409
- \[Docs] Remove unneeded " in README by
[@&#8203;takahirom](https://togithub.com/takahirom) in
[takahirom/roborazzi#410
- \[Feature] Read external resources locally when generating html report
by [@&#8203;eyedol](https://togithub.com/eyedol) in
[takahirom/roborazzi#404
- \[CI] Update dependency gradle to v8.8 by
[@&#8203;renovate](https://togithub.com/renovate) in
[takahirom/roborazzi#354
- \[Bug fix] Fix windows report relative path by
[@&#8203;takahirom](https://togithub.com/takahirom) in
[takahirom/roborazzi#419

**Full Changelog**:
takahirom/roborazzi@1.20.0...1.21.0

</details>

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gradle/libs.versions.toml

@@ -45,7 +45,7 @@ okio = "3.9.0"
 paparazzi = "1.3.4"
 picnic = "0.7.0"
 robolectric = "4.12.2"
-roborazzi = "1.20.0"
+roborazzi = "1.21.0"
 skie = "0.8.2"
 spotless = "6.23.3"
 sqldelight = "2.0.2"