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.contrib.sensors.sagemaker_endpoint_sensor.SageMakerEndpointSensor',
    ),
    (
        'airflow.providers.amazon.aws.sensors.sagemaker_transform.SageMakerTransformSensor',
        'airflow.contrib.sensors.sagemaker_transform_sensor.SageMakerTransformSensor',
    ),
    (
        'airflow.providers.amazon.aws.sensors.sagemaker_tuning.SageMakerTuningSensor',
        'airflow.contrib.sensors.sagemaker_tuning_sensor.SageMakerTuningSensor',
    ),
    (
        'airflow.providers.amazon.aws.operators.s3_file_transform.S3FileTransformOperator',
        'airflow.operators.s3_file_transform_operator.S3FileTransformOperator',
    ),
    (
        'airflow.providers.amazon.aws.sensors.s3_key.S3KeySensor',
        'airflow.sensors.s3_key_sensor.S3KeySensor',
    ),
    (
        'airflow.providers.amazon.aws.sensors.s3_prefix.S3PrefixSensor',
        'airflow.sensors.s3_prefix_sensor.S3PrefixSensor',
    ),
    (
        'airflow.sensors.bash.BashSensor',
        'airflow.contrib.sensors.bash_sensor.BashSensor',
    ),
    (
        'airflow.providers.celery.sensors.celery_queue.CeleryQueueSensor',
        'airflow.contrib.sensors.celery_queue_sensor.CeleryQueueSensor',
    ),