Update 'flutter/.github/workflows/main.yml'

flutter/.github/workflows/main.yml

@@ -28,7 +28,7 @@ jobs:
         uses: subosito/flutter-action@v1.5.3
         with:
           channel: "stable"
-          flutter-version: "2.0.5"
+          flutter-version: "2.5.2"
       
       - name: Cache Dependencies
         id: cache