remove gradle again

frontend/.github/workflows/build_app_android.yaml

@@ -30,7 +30,7 @@ jobs:
           REF_NAME: ${{ github.ref_name }}
         run:
           # remove the 'v' prefix from the tag name
-          echo "VERSION=${REF_NAME//v}" >> $GITHUB_OUTPUT
+          echo "VERSION_NAME=${REF_NAME//v}" >> $GITHUB_ENV
 
       - name: Load secrets from github
         run: |
@@ -46,5 +46,4 @@ jobs:
       - name: Run fastlane lane
         run: bundle exec fastlane deploy_testing
         working-directory: android
-        env:
-          VERSION_NAME: ${{ steps.version.VERSION }}
+        # the environment variable VERSION_NAME is implicitly available