Fix build workflow

Author: ufrshubham

.github/workflows/build.yaml

@@ -15,7 +15,7 @@ jobs:
         with:
           fetch-depth: 0
       - uses: subosito/flutter-action@v2
-      - run: flutter format --set-exit-if-changed .
+      - run: dart format --set-exit-if-changed .
       - run: flutter analyze .
       - run: flutter config --enable-windows-desktop
       - run: flutter build windows