Update Flutter version in deploy workflow

Author: ph-value

.github/workflows/deploy.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Flutter
         uses: subosito/flutter-action@v2
         with:
-          flutter-version: "3.19.0"
+          flutter-version: "3.35.3"
 
       - name: Install dependencies
         run: flutter pub get