ci: use flutter beta channel for deploy

- Use beta channel
- Disable cache

Author: fulleni

.github/workflows/deploy.yml

@@ -17,8 +17,9 @@ jobs:
       - name: Setup Flutter
         uses: subosito/flutter-action@v2
         with:
-          channel: 'stable' # Use the stable channel of Flutter
-
+          channel: 'beta' # Use the stable channel of Flutter
+          cache: false
+          
       # 3. Get Flutter dependencies
       - name: Get dependencies
         run: flutter pub get