Bump subosito/flutter-action from 2.10.0 to 2.12.0 (#638)

Bumps [subosito/flutter-action](https://github.com/subosito/flutter-action) from 2.10.0 to 2.12.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/subosito/flutter-action/releases">subosito/flutter-action's releases</a>.</em></p>
<blockquote>
<h2>v2.12.0</h2>
<p>No release notes provided.</p>
<h2>v2.11.0</h2>
<p>Allow git ref as version for master channel:</p>
<pre lang="yaml"><code>steps:
- uses: actions/checkout@v3
- uses: subosito/flutter-action@v2
  with:
    flutter-version: '5b12b74' # tag, commit or branch
    channel: 'master'
- run: flutter --version
</code></pre>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/subosito/flutter-action/commit/2783a3f08e1baf891508463f8c6653c258246225"><code>2783a3f</code></a> ensure setup.sh executable; fixes <a href="https://redirect.github.com/subosito/flutter-action/issues/245">#245</a></li>
<li><a href="https://github.com/subosito/flutter-action/commit/c33c37022b3aac486cc5e7aea5c7f6b8b0f421e1"><code>c33c370</code></a> Extract to a temporary location to enable moving of flutter folder. (<a href="https://redirect.github.com/subosito/flutter-action/issues/227">#227</a>)</li>
<li><a href="https://github.com/subosito/flutter-action/commit/cc97e1648fff6ca5cc647fa67f47e70f7895510b"><code>cc97e16</code></a> feat: Allow git ref as version in <code>master</code> channel (<a href="https://redirect.github.com/subosito/flutter-action/issues/237">#237</a>)</li>
<li><a href="https://github.com/subosito/flutter-action/commit/ed388baf1d5404fd6ef3c54c2f82e6159150b60f"><code>ed388ba</code></a> fixes <a href="https://redirect.github.com/subosito/flutter-action/issues/224">#224</a>; update readme</li>
<li>See full diff in <a href="https://github.com/subosito/flutter-action/compare/48cafc24713cca54bbe03cdc3a423187d413aafa...2783a3f08e1baf891508463f8c6653c258246225">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=subosito/flutter-action&package-manager=github_actions&previous-version=2.10.0&new-version=2.12.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

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</details>

.github/workflows/test-package.yml

@@ -107,7 +107,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
-      - uses: subosito/flutter-action@48cafc24713cca54bbe03cdc3a423187d413aafa
+      - uses: subosito/flutter-action@2783a3f08e1baf891508463f8c6653c258246225
         with:
           channel: "master"
       - name: Install dependencies