chore: Update Airflow 2 GKE sample to use regional clusters (#7753)
chore: Update Airflow 2 GKE sample to use regional clusters (#7753)

* Update Airflow 2 GKE sample to use regional clusters

* add commentabout cluster location
GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples