use correct cache tag

Author: qui-jason

.github/workflows/dargon2_flutter_tests.yml

@@ -37,7 +37,7 @@ jobs:
           path: |
             ~/.android/avd/*
             ~/.android/adb*
-          key: avd-33-arm64
+          key: avd-34-arm64
       - name: Download Flutter
         uses: subosito/flutter-action@v2
         with: