build: update flutter setup in deploy workflow

- Removed flutter version spec
- Using stable channel

Author: fulleni

.github/workflows/deploy.yml

@@ -17,7 +17,6 @@ jobs:
       - name: Setup Flutter
         uses: subosito/flutter-action@v2
         with:
-          flutter-version: '3.32.x' # Specify the Flutter version you want to use
           channel: 'stable' # Use the stable channel of Flutter
 
       # 3. Get Flutter dependencies