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.operators.sql.SQLCheckOperator',
        'airflow.operators.presto_check_operator.PrestoCheckOperator',
    ),
    (
        'airflow.operators.sql.SQLIntervalCheckOperator',
        'airflow.operators.presto_check_operator.PrestoIntervalCheckOperator',
    ),
    (
        'airflow.operators.sql.SQLValueCheckOperator',
        'airflow.operators.presto_check_operator.PrestoValueCheckOperator',
    ),
    (
        'airflow.operators.sql.SQLCheckOperator',
        'airflow.operators.check_operator.CheckOperator',
    ),
    (
        'airflow.operators.sql.SQLIntervalCheckOperator',
        'airflow.operators.check_operator.IntervalCheckOperator',
    ),
    (
        'airflow.operators.sql.SQLValueCheckOperator',
        'airflow.operators.check_operator.ValueCheckOperator',
    ),
    (
        'airflow.operators.sql.SQLThresholdCheckOperator',
        'airflow.operators.check_operator.ThresholdCheckOperator',
    ),
    (