ci: Use dart-lang/setup-dart@v1

Author: nielsenko

.github/workflows/dart-tests.yaml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Dart
-        uses: dart-lang/setup-dart@v1.3
+        uses: dart-lang/setup-dart@v1
         with:
           sdk: ${{ matrix.dart_sdk }}