fix deprecated stuff

Author: josiauh

.github/workflows/flutter_build.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Set up Flutter
       uses: subosito/flutter-action@v2
       with:
-        flutter-version: '2.10.0' # Specify the Flutter version you want to use
+        flutter-version: '3.27.2' # Specify the Flutter version you want to use
 
     - name: Install dependencies
       run: flutter pub get
@@ -38,7 +38,7 @@ jobs:
         fi
 
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4.6.0
       with:
         name: build-${{ matrix.os }}
         path: |