Fix after rebase: Make ci.yml same as user_model

* CI changes were made in the main branch AND the user_model/main branch.
* So let's keep the version on user_model/main, which this commit does

Author: nan-li

.github/workflows/ci.yml

@@ -30,7 +30,7 @@ jobs:
         run: flutter analyze
 
       - name: Ensure the Dart code is formatted correctly
-        run: flutter format -o none --set-exit-if-changed .
+        run: flutter format --set-exit-if-changed --dry-run .
 
       - name: Run Flutter unit tests
         run: flutter test