Fix GCSListObjectsOperator docstring (#25614)
Fix GCSListObjectsOperator docstring (#25614)

Co-authored-by: Tzu-ping Chung <2e53b0ad3dd47d6e307c848b4062b6f9b074f9b0@gmail.com>
nathanielvarona/airflow,nathanielvarona/airflow,nathanielvarona/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,apache/airflow,apache/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,apache/airflow,nathanielvarona/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,cfei18/incubator-airflow,apache/airflow,apache/airflow,apache/airflow,cfei18/incubator-airflow