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.samba.hooks.samba.SambaHook',
        'airflow.hooks.samba_hook.SambaHook',
    ),
    (
        'airflow.providers.sqlite.hooks.sqlite.SqliteHook',
        'airflow.hooks.sqlite_hook.SqliteHook',
    ),
    (
        'airflow.providers.cloudant.hooks.cloudant.CloudantHook',
        'airflow.contrib.hooks.cloudant_hook.CloudantHook',
    ),
    (
        'airflow.providers.databricks.hooks.databricks.DatabricksHook',
        'airflow.contrib.hooks.databricks_hook.DatabricksHook',
    ),
    (
        'airflow.providers.databricks.hooks.databricks.DatabricksHook',
        'airflow.contrib.hooks.databricks_hook.DatabricksHook',
    ),
    (
        'airflow.providers.datadog.hooks.datadog.DatadogHook',
        'airflow.contrib.hooks.datadog_hook.DatadogHook',
    ),
    (
        'airflow.providers.dingding.hooks.dingding.DingdingHook',
        'airflow.contrib.hooks.dingding_hook.DingdingHook',
    ),
    (