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.microsoft.azure.hooks.azure_fileshare.AzureFileShareHook',
        'airflow.contrib.hooks.azure_fileshare_hook.AzureFileShareHook',
    ),
    (
        'airflow.providers.microsoft.azure.hooks.wasb.WasbHook',
        'airflow.contrib.hooks.wasb_hook.WasbHook',
    ),
    (
        'airflow.providers.amazon.aws.hooks.glue_catalog.AwsGlueCatalogHook',
        'airflow.contrib.hooks.aws_glue_catalog_hook.AwsGlueCatalogHook',
    ),
    (
        'airflow.providers.amazon.aws.hooks.logs.AwsLogsHook',
        'airflow.contrib.hooks.aws_logs_hook.AwsLogsHook',
    ),
    (
        'airflow.providers.amazon.aws.hooks.emr.EmrHook',
        'airflow.contrib.hooks.emr_hook.EmrHook',
    ),
    (
        'airflow.providers.amazon.aws.hooks.sagemaker.SageMakerHook',
        'airflow.contrib.hooks.sagemaker_hook.SageMakerHook',
    ),
    (
        'airflow.providers.mongo.hooks.mongo.MongoHook',
        'airflow.contrib.hooks.mongo_hook.MongoHook',
    ),
    (