Update dart.yml

Author: cloudwebrtc

.github/workflows/dart.yml

@@ -19,10 +19,11 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v1
         with:
-          java-version: '12.x'
-      - uses: subosito/flutter-action@v1
+          java-version: '17.x'
+      - uses: actions/checkout@v2
+      - uses: subosito/flutter-action@v2
         with:
-          flutter-version: '3.27.1'
+          channel: 'stable'
       - name: Install project dependencies
         run: flutter pub get
       - name: Dart Format Check