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.discord.hooks.discord_webhook.DiscordWebhookHook',
        'airflow.contrib.hooks.discord_webhook_hook.DiscordWebhookHook',
    ),
    (
        'airflow.providers.google.suite.hooks.drive.GoogleDriveHook',
        'airflow.contrib.hooks.gdrive_hook.GoogleDriveHook',
    ),
    (
        'airflow.providers.jenkins.hooks.jenkins.JenkinsHook',
        'airflow.contrib.hooks.jenkins_hook.JenkinsHook',
    ),
    (
        'airflow.providers.jira.hooks.jira.JiraHook',
        'airflow.contrib.hooks.jira_hook.JiraHook',
    ),
    (
        'airflow.providers.opsgenie.hooks.opsgenie_alert.OpsgenieAlertHook',
        'airflow.contrib.hooks.opsgenie_alert_hook.OpsgenieAlertHook',
    ),
    (
        'airflow.providers.pagerduty.hooks.pagerduty.PagerdutyHook',
        'airflow.contrib.hooks.pagerduty_hook.PagerdutyHook',
    ),
    (
        'airflow.providers.qubole.hooks.qubole_check.QuboleCheckHook',
        'airflow.contrib.hooks.qubole_check_hook.QuboleCheckHook',
    ),
    (
        'airflow.providers.qubole.hooks.qubole.QuboleHook',
        'airflow.contrib.hooks.qubole_hook.QuboleHook',