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.redis.operators.redis_publish.RedisPublishOperator',
        'airflow.contrib.operators.redis_publish_operator.RedisPublishOperator',
    ),
    (
        'airflow.operators.branch.BaseBranchOperator',
        'airflow.operators.branch_operator.BaseBranchOperator',
    ),
    (
        'airflow.operators.bash.BashOperator',
        'airflow.operators.bash_operator.BashOperator',
    ),
    (
        'airflow.providers.docker.operators.docker.DockerOperator',
        'airflow.operators.docker_operator.DockerOperator',
    ),
    (
        'airflow.providers.microsoft.mssql.operators.mssql.MsSqlOperator',
        'airflow.operators.mssql_operator.MsSqlOperator',
    ),
    (
        'airflow.providers.mysql.operators.mysql.MySqlOperator',
        'airflow.operators.mysql_operator.MySqlOperator',
    ),
    (
        'airflow.providers.oracle.operators.oracle.OracleOperator',
        'airflow.operators.oracle_operator.OracleOperator',
    ),
    (
        'airflow.providers.papermill.operators.papermill.PapermillOperator',
        'airflow.operators.papermill_operator.PapermillOperator',