Bump dart-lang/setup-dart (#65)

Bumps [dart-lang/setup-dart](https://github.com/dart-lang/setup-dart) from 7b1734b to a57a6c0.
- [Release notes](https://github.com/dart-lang/setup-dart/releases)
- [Changelog](https://github.com/dart-lang/setup-dart/blob/main/CHANGELOG.md)
- [Commits](7b1734b...a57a6c0)

---
updated-dependencies:
- dependency-name: dart-lang/setup-dart
  dependency-type: direct:production
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/publish.yml

@@ -30,7 +30,7 @@ jobs:
       # Checkout repository
       - uses: actions/checkout@v3
       # Setup Dart SDK with JWT token
-      - uses: dart-lang/setup-dart@7b1734b5b08d53fbf347cf96b664fa1a49cc6497
+      - uses: dart-lang/setup-dart@a57a6c04cf7d4840e88432aad6281d1e125f0d46
       # Minimal package setup and dry run checks.
       - name: Install dependencies
         run: dart pub get