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.contrib.operators.gcp_function_operator.GcfFunctionDeleteOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.functions.CloudFunctionDeployFunctionOperator",
        "airflow.contrib.operators.gcp_function_operator.GcfFunctionDeployOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.natural_language."
        "CloudNaturalLanguageAnalyzeEntitiesOperator",
        "airflow.contrib.operators.gcp_natural_language_operator.CloudLanguageAnalyzeEntitiesOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.natural_language."
        "CloudNaturalLanguageAnalyzeEntitySentimentOperator",
        "airflow.contrib.operators.gcp_natural_language_operator."
        "CloudLanguageAnalyzeEntitySentimentOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.natural_language."
        "CloudNaturalLanguageAnalyzeSentimentOperator",
        "airflow.contrib.operators.gcp_natural_language_operator.CloudLanguageAnalyzeSentimentOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.natural_language."
        "CloudNaturalLanguageClassifyTextOperator",
        "airflow.contrib.operators.gcp_natural_language_operator.CloudLanguageClassifyTextOperator",
    ),
    (
        "airflow.providers.google.cloud.operators.spanner.SpannerDeleteDatabaseInstanceOperator",
        "airflow.contrib.operators.gcp_spanner_operator.CloudSpannerInstanceDatabaseDeleteOperator",