Typo in Google Cloud Storage sensor: airflow/providers/google/cloud/sensors/gcs/GCSObjectsWithPrefixExistenceSensor

The word _With_ is spelled incorrectly. It should be: GCSObjects**With**PrefixExistenceSensor

**Apache Airflow version**: 2.0.0
**Environment**:
- **Cloud provider or hardware configuration**: Google Cloud
- **OS** (e.g. from /etc/os-release): Mac OS BigSur






tests/deprecated_classes.py
"airflow.utils.log.s3_task_handler.S3TaskHandler",
    ),
    (
        'airflow.providers.amazon.aws.log.cloudwatch_task_handler.CloudwatchTaskHandler',
        'airflow.utils.log.cloudwatch_task_handler.CloudwatchTaskHandler',
    ),
    (
        'airflow.providers.elasticsearch.log.es_task_handler.ElasticsearchTaskHandler',
        'airflow.utils.log.es_task_handler.ElasticsearchTaskHandler',
    ),
    (
        "airflow.providers.google.cloud.log.stackdriver_task_handler.StackdriverTaskHandler",
        "airflow.utils.log.stackdriver_task_handler.StackdriverTaskHandler",
    ),
    (
        "airflow.providers.google.cloud.log.gcs_task_handler.GCSTaskHandler",
        "airflow.utils.log.gcs_task_handler.GCSTaskHandler",
    ),
    (
        "airflow.providers.microsoft.azure.log.wasb_task_handler.WasbTaskHandler",
        "airflow.utils.log.wasb_task_handler.WasbTaskHandler",
    ),
]
ALL = HOOKS + OPERATORS + SECRETS + SENSORS + TRANSFERS + UTILS + LOGS
RENAMED_ALL = [
    (old_class, new_class)
    for old_class, new_class in HOOKS + OPERATORS + SECRETS + SENSORS + UTILS
    if old_class.rpartition(".")[2] != new_class.rpartition(".")[2]
]