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.providers.google.cloud.sensors.gcs.GCSObjectExistenceSensor",
        "airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectSensor",
    ),
    (
        "airflow.providers.google.cloud.sensors.gcs.GCSObjectUpdateSensor",
        "airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageObjectUpdatedSensor",
    ),
    (
        "airflow.providers.google.cloud.sensors.gcs.GCSObjectsWtihPrefixExistenceSensor",
        "airflow.contrib.sensors.gcs_sensor.GoogleCloudStoragePrefixSensor",
    ),
    (
        "airflow.providers.google.cloud.sensors.gcs.GCSUploadSessionCompleteSensor",
        "airflow.contrib.sensors.gcs_sensor.GoogleCloudStorageUploadSessionCompleteSensor",
    ),
    (
        "airflow.providers.amazon.aws.sensors.athena.AthenaSensor",
        "airflow.contrib.sensors.aws_athena_sensor.AthenaSensor",
    ),
    (
        "airflow.providers.amazon.aws.sensors.sqs.SQSSensor",
        "airflow.contrib.sensors.aws_sqs_sensor.SQSSensor",
    ),
    (
        'airflow.providers.apache.hdfs.sensors.hdfs.HdfsFolderSensor',
        'airflow.contrib.sensors.hdfs_sensor.HdfsSensorFolder',
    ),
    (
        'airflow.providers.apache.hdfs.sensors.hdfs.HdfsRegexSensor',