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.openfaas.hooks.openfaas.OpenFaasHook',
        'airflow.contrib.hooks.openfaas_hook.OpenFaasHook',
    ),
    (
        'airflow.providers.redis.hooks.redis.RedisHook',
        'airflow.contrib.hooks.redis_hook.RedisHook',
    ),
    (
        'airflow.providers.docker.hooks.docker.DockerHook',
        'airflow.hooks.docker_hook.DockerHook',
    ),
    (
        'airflow.providers.microsoft.mssql.hooks.mssql.MsSqlHook',
        'airflow.hooks.mssql_hook.MsSqlHook',
    ),
    (
        'airflow.providers.mysql.hooks.mysql.MySqlHook',
        'airflow.hooks.mysql_hook.MySqlHook',
    ),
    (
        'airflow.providers.oracle.hooks.oracle.OracleHook',
        'airflow.hooks.oracle_hook.OracleHook',
    ),
    (
        'airflow.providers.postgres.hooks.postgres.PostgresHook',
        'airflow.hooks.postgres_hook.PostgresHook',
    ),
    (
        'airflow.providers.presto.hooks.presto.PrestoHook',
        'airflow.hooks.presto_hook.PrestoHook',