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.sensors.qubole_sensor.QuboleFileSensor',
    ),
    (
        'airflow.providers.ftp.sensors.ftp.FTPSensor',
        'airflow.contrib.sensors.ftp_sensor.FTPSensor',
    ),
    (
        'airflow.providers.ftp.sensors.ftp.FTPSSensor',
        'airflow.contrib.sensors.ftp_sensor.FTPSSensor',
    ),
    (
        'airflow.providers.imap.sensors.imap_attachment.ImapAttachmentSensor',
        'airflow.contrib.sensors.imap_attachment_sensor.ImapAttachmentSensor',
    ),
    (
        'airflow.providers.jira.sensors.jira.JiraSensor',
        'airflow.contrib.sensors.jira_sensor.JiraSensor',
    ),
    (
        'airflow.providers.jira.sensors.jira.JiraTicketSensor',
        'airflow.contrib.sensors.jira_sensor.JiraTicketSensor',
    ),
    (
        'airflow.providers.http.sensors.http.HttpSensor',
        'airflow.sensors.http_sensor.HttpSensor',
    ),
    (
        'airflow.providers.sftp.sensors.sftp.SFTPSensor',
        'airflow.contrib.sensors.sftp_sensor.SFTPSensor',
    ),