test: changed the verification

.gitea/workflows/back.yaml

@@ -1,4 +1,4 @@
-name: check backend
+name: Format
 
 on: [ push, pull_request ]
 
@@ -10,4 +10,7 @@ jobs:
       - uses: actions/checkout@v4 # v2 minimum required
       - uses: axel-op/googlejavaformat-action@v3
         with:
-          args: "--set-exit-if-changed --aosp"
+          args: "--replace"
+          skip-commit: true
+      - name: Print diffs
+        run: git --no-pager diff --exit-code