ci: update flutter action version

- Updated to flutter-action@v2
- Specified Flutter version
- Using stable channel

Author: fulleni

.github/workflows/deploy.yml

@@ -18,7 +18,6 @@ jobs:
         uses: subosito/flutter-action@v2
         with:
           flutter-version: '3.22.x' # Specify the Flutter version you want to use
-          cache: true # Enable caching for Flutter dependencies
           channel: 'stable' # Use the stable channel of Flutter
 
       # 3. Get Flutter dependencies