chore(deps): Bump wpt from a9bb868 to 8ac56ca (#3904)

Bumps [wpt](https://github.com/web-platform-tests/wpt) from `a9bb868` to
`8ac56ca`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/8ac56ca5bff0294794dfaaef0a9c3ee5b2da2d1b"><code>8ac56ca</code></a>
VT: Escape view transition names when creating dynamic styles.</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/4cb0362ba6265e0818f892ff6d335b786130f55e"><code>4cb0362</code></a>
[gap-decorations] Rule <code>inset</code> properties implementation</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/42d2e6ce508c906df5c1e7016dc2f0086b8bc801"><code>42d2e6c</code></a>
Coerce singular matrix from GetCTM to identity.</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/ff0be2601af406f1f756cc642baece9703949c7a"><code>ff0be26</code></a>
Split getCTM and getScreenCTM subtests.</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/cb5f08a87fd468abbade9005c8cf2ced9f95c75e"><code>cb5f08a</code></a>
[gap-decorations] Rename test files to match <code>outset</code> to
<code>inset</code> rename</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/b309d20b304af67e4c7e38c5ebd220a47347edb9"><code>b309d20</code></a>
[gap-decorations] Rename <code>outset</code> properties to
<code>inset</code></li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/295c5cef574c15782af987a0efbba0f03872f049"><code>295c5ce</code></a>
[gap-decorations] Fix multicol CrossGap's EdgeIntersection state</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/ef6fcf9d74f6ce25dcc7cd08676aadf908fc825a"><code>ef6fcf9</code></a>
Fix: Fix a css rule in testharness.js</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/c43706f1e423e9810d116c9c15e6daacad988711"><code>c43706f</code></a>
[css-lists] Apply new algorithm for initial counter in reversed
list</li>
<li><a
href="https://github.com/web-platform-tests/wpt/commit/60e6e3a59de74e93dc4838e18b79564d7d93164d"><code>60e6e3a</code></a>
extend tests to restore original state (<a
href="https://redirect.github.com/web-platform-tests/wpt/issues/55942">#55942</a>)</li>
<li>See full diff in <a
href="https://github.com/web-platform-tests/wpt/compare/a9bb8680d84e67d75bff1dcbe497f4e319c3682b...8ac56ca5bff0294794dfaaef0a9c3ee5b2da2d1b">compare
view</a></li>
</ul>
</details>
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Author: 3 people