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.postgres.operators.postgres.PostgresOperator',
        'airflow.operators.postgres_operator.PostgresOperator',
    ),
    (
        "airflow.providers.google.cloud.operators.speech_to_text.CloudSpeechToTextRecognizeSpeechOperator",
        "airflow.contrib.operators.gcp_speech_to_text_operator.GcpSpeechToTextRecognizeSpeechOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.text_to_speech.CloudTextToSpeechSynthesizeOperator",
        "airflow.contrib.operators.gcp_text_to_speech_operator.GcpTextToSpeechSynthesizeOperator",
    ),
    (
        "airflow.operators.latest_only.LatestOnlyOperator",
        "airflow.operators.latest_only_operator.LatestOnlyOperator",
    ),
    (
        "airflow.operators.trigger_dagrun.TriggerDagRunOperator",
        "airflow.operators.dagrun_operator.TriggerDagRunOperator",
    ),
    (
        "airflow.operators.subdag.SubDagOperator",
        "airflow.operators.subdag_operator.SubDagOperator",
    ),
    (
        "airflow.operators.dummy.DummyOperator",
        "airflow.operators.dummy_operator.DummyOperator",
    ),
]