Update README.md

Author: socheatsok78

README.md

@@ -46,7 +46,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup Flutter SDK
-        uses: flutter-actions/setup-flutter@v3
+        uses: flutter-actions/setup-flutter@v4
         with:
           channel: stable
           version: 3.0.2