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.hive.hooks.hive.HiveServer2Hook',
        'airflow.hooks.hive_hooks.HiveServer2Hook',
    ),
    (
        'airflow.providers.apache.pig.hooks.pig.PigCliHook',
        'airflow.hooks.pig_hook.PigCliHook',
    ),
    (
        'airflow.providers.apache.hdfs.hooks.webhdfs.WebHDFSHook',
        'airflow.hooks.webhdfs_hook.WebHDFSHook',
    ),
    (
        'airflow.hooks.filesystem.FSHook',
        'airflow.contrib.hooks.fs_hook.FSHook',
    ),
    (
        'airflow.providers.microsoft.azure.hooks.azure_container_instance.AzureContainerInstanceHook',
        'airflow.contrib.hooks.azure_container_instance_hook.AzureContainerInstanceHook',
    ),
    (
        'airflow.providers.microsoft.azure.hooks.azure_container_registry.AzureContainerRegistryHook',
        'airflow.contrib.hooks.azure_container_registry_hook.AzureContainerRegistryHook',
    ),
    (
        'airflow.providers.microsoft.azure.hooks.azure_container_volume.AzureContainerVolumeHook',
        'airflow.contrib.hooks.azure_container_volume_hook.AzureContainerVolumeHook',
    ),
    (
        'airflow.providers.microsoft.azure.hooks.azure_cosmos.AzureCosmosDBHook',
        'airflow.contrib.hooks.azure_cosmos_hook.AzureCosmosDBHook',