Ensure examples are sync in CI

Author: ruudk

.github/workflows/ci.yml

@@ -41,6 +41,9 @@ jobs:
         with:
           dependency-versions: ${{ matrix.dependency-versions }}
 
+      - name: Ensure sync
+        run: bin/graphql-client-code-generator --config=examples/config.php --config=tests/config.php --ensure-sync
+
       - name: Run tests
         run: vendor/bin/phpunit