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.apache.cassandra.hooks.cassandra.CassandraHook",
        "airflow.contrib.hooks.cassandra_hook.CassandraHook",
    ),
    (
        "airflow.providers.google.cloud.hooks.compute.ComputeEngineHook",
        "airflow.contrib.hooks.gcp_compute_hook.GceHook",
    ),
    (
        "airflow.providers.google.common.hooks.base_google.GoogleBaseHook",
        "airflow.contrib.hooks.gcp_api_base_hook.GoogleBaseHook",
    ),
    (
        "airflow.providers.google.cloud.hooks.dataflow.DataflowHook",
        "airflow.contrib.hooks.gcp_dataflow_hook.DataFlowHook",
    ),
    (
        "airflow.providers.google.cloud.hooks.dataproc.DataprocHook",
        "airflow.contrib.hooks.gcp_dataproc_hook.DataProcHook",
    ),
    (
        "airflow.providers.google.cloud.hooks.dlp.CloudDLPHook",
        "airflow.contrib.hooks.gcp_dlp_hook.CloudDLPHook",
    ),
    (
        "airflow.providers.google.cloud.hooks.functions.CloudFunctionsHook",
        "airflow.contrib.hooks.gcp_function_hook.GcfHook",
    ),
    (
        "airflow.providers.google.cloud.hooks.kms.CloudKMSHook",
        "airflow.contrib.hooks.gcp_kms_hook.GoogleCloudKMSHook",