ci: update Flutter to 3.41.4 for Dart 3.10 compatibility

Author: liuboping

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
-          flutter-version: '3.27.3'
+          flutter-version: '3.41.4'
       - name: Install Linux dependencies
         if: matrix.platform == 'ubuntu-latest'
         run: |