Update Flutter SDK version and action to v4

Author: TechAurelian

.github/workflows/build-flutter-web.yml

@@ -24,10 +24,10 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup Flutter SDK
-        uses: flutter-actions/setup-flutter@v2
+        uses: flutter-actions/setup-flutter@v4
         with:
           channel: stable
-          version: 3.24.4
+          version: 3.32.4
       - name: Clean
         run: flutter clean
       - name: Pub Get