Use flutter version from fvm

.github/workflows/checks.yaml

@@ -14,11 +14,18 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4.1.1
 
+      - name: Fetch version info
+        run: |
+          # Extract flutter_version from .fvmrc
+          FLUTTER_VERSION=$(jq -r '.flutter' .fvmrc)
+          echo "FLUTTER_VERSION=${FLUTTER_VERSION}" >> "$GITHUB_ENV"
+        shell: bash
+
       - name: Set up Flutter
         uses: subosito/flutter-action@v2.16.0
         with:
           channel: ${{ vars.FLUTTER_CHANNEL }}
-          flutter-version: ${{ vars.FLUTTER_VERSION }}
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           cache: true
           cache-key: "flutter-:os:-:channel:-:version:-:arch:-:hash:"
           cache-path: "${{ runner.tool_cache }}/flutter/:channel:-:version:-:arch:"
@@ -26,10 +33,10 @@ jobs:
       - name: Get dependencies
         run: flutter pub get
 
-      - name: Setup dart
+      - name: Setup Dart
         uses: dart-lang/setup-dart@v1
 
-      - name: Analyze Dart      
+      - name: Analyze Dart
         uses: invertase/github-action-dart-analyzer@v3
         with:
           custom-lint: true