chore(api/tests): apply ruff reformat #7590 (#7591)

Co-authored-by: -LAN- <laipz8200@outlook.com>

api/tests/integration_tests/tools/__mock_server/openapi_todo.py

@@ -10,6 +10,7 @@ todos_data = {
     "user1": ["Go for a run", "Read a book"],
 }
 
+
 class TodosResource(Resource):
     def get(self, username):
         todos = todos_data.get(username, [])
@@ -32,7 +33,8 @@ class TodosResource(Resource):
 
         return {"error": "Invalid todo index"}, 400
 
-api.add_resource(TodosResource, '/todos/<string:username>')
 
-if __name__ == '__main__':
+api.add_resource(TodosResource, "/todos/<string:username>")
+
+if __name__ == "__main__":
     app.run(port=5003, debug=True)