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.sftp.hooks.sftp.SFTPHook',
        'airflow.contrib.hooks.sftp_hook.SFTPHook',
    ),
]
OPERATORS = [
    (
        "airflow.providers.google.cloud.operators.dataflow.DataflowCreateJavaJobOperator",
        "airflow.contrib.operators.dataflow_operator.DataFlowJavaOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.dataflow.DataflowCreatePythonJobOperator",
        "airflow.contrib.operators.dataflow_operator.DataFlowPythonOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.dataflow.DataflowTemplatedJobStartOperator",
        "airflow.contrib.operators.dataflow_operator.DataflowTemplateOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.datastore.CloudDatastoreExportEntitiesOperator",
        "airflow.contrib.operators.datastore_export_operator.DatastoreExportOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.datastore.CloudDatastoreImportEntitiesOperator",
        "airflow.contrib.operators.datastore_import_operator.DatastoreImportOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.bigtable.BigtableUpdateClusterOperator",
        "airflow.contrib.operators.gcp_bigtable_operator.BigtableClusterUpdateOperator",