Bump github from 9.20.0 to 9.22.0 in /app_dart (#3385)

Bumps [github](https://github.com/SpinlockLabs/github.dart) from 9.20.0 to 9.22.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/SpinlockLabs/github.dart/blob/master/CHANGELOG.md">github's changelog</a>.</em></p>
<blockquote>
<h2>9.22.0</h2>
<ul>
<li>Add support for the <code>Ghost</code> user when the Github user is deleted.</li>
</ul>
<h2>9.21.0</h2>
<ul>
<li>Update MiscService.getApiStatus() to use the v2 API
<ul>
<li><code>APIStatus</code> has been refactored to match, now exposing <code>page</code> and <code>status</code></li>
</ul>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/SpinlockLabs/github.dart/commit/6b9678e0d207bdf4d74a6d43b84b000e8211de4b"><code>6b9678e</code></a> Make <code>User</code> field nullable in <code>PullRequestReview</code> (<a href="https://github.com/SpinlockLabs/github.dart/issues/383">#383</a>)</li>
<li><a href="https://github.com/SpinlockLabs/github.dart/commit/741c26d0142413b80b89049772a5e693e064ebfb"><code>741c26d</code></a> Update MiscService.getApiStatus to v2 (<a href="https://github.com/SpinlockLabs/github.dart/issues/393">#393</a>)</li>
<li><a href="https://github.com/SpinlockLabs/github.dart/commit/7bc06677699847218e196d86a1839045464fcdec"><code>7bc0667</code></a> Bump actions/github-script from 6 to 7 (<a href="https://github.com/SpinlockLabs/github.dart/issues/394">#394</a>)</li>
<li><a href="https://github.com/SpinlockLabs/github.dart/commit/df7118a9b632a8754db07deccf8f5bf3a75d3620"><code>df7118a</code></a> Bump actions/checkout from 3 to 4 (<a href="https://github.com/SpinlockLabs/github.dart/issues/395">#395</a>)</li>
<li><a href="https://github.com/SpinlockLabs/github.dart/commit/948c0f9310472c66dc75a8d29b335ee586be0317"><code>948c0f9</code></a> Bump JamesIves/github-pages-deploy-action from 4.4.3 to 4.5.0 (<a href="https://github.com/SpinlockLabs/github.dart/issues/396">#396</a>)</li>
<li><a href="https://github.com/SpinlockLabs/github.dart/commit/52f71de142641849cff1121a0d8b33c01549ec57"><code>52f71de</code></a> Update release process to use actions (<a href="https://github.com/SpinlockLabs/github.dart/issues/392">#392</a>)</li>
<li><a href="https://github.com/SpinlockLabs/github.dart/commit/d2c7bb288b07cb4e6b46bfa7a485523e59681303"><code>d2c7bb2</code></a> Bump JamesIves/github-pages-deploy-action from 4.4.2 to 4.4.3 (<a href="https://github.com/SpinlockLabs/github.dart/issues/382">#382</a>)</li>
<li><a href="https://github.com/SpinlockLabs/github.dart/commit/1d4023c62ada078fb624344c842b2344893084e8"><code>1d4023c</code></a> Bump actions/checkout from 3 to 4 (<a href="https://github.com/SpinlockLabs/github.dart/issues/388">#388</a>)</li>
<li>See full diff in <a href="https://github.com/SpinlockLabs/github.dart/compare/9.20.0...9.22.0">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=github&package-manager=pub&previous-version=9.20.0&new-version=9.22.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

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</details>

app_dart/pubspec.yaml

@@ -20,7 +20,7 @@ dependencies:
   file: 7.0.0
   fixnum: 1.1.0
   gcloud: 0.8.11
-  github: 9.20.0
+  github: 9.22.0
   googleapis: 11.4.0
   googleapis_auth: 1.4.1
   gql: 1.0.1-alpha+1696717343881