update airflow user create command
- Update airflow user create command in documentation
- REF of official airflow documentation https://airflow.apache.org/docs/apache-airflow/stable/cli-and-env-variables-ref.html#create_repeat1
Community will be down this weekend for data migration in preparation for GitLab 17.0. Work will start at 10pm UTC (5pm CDT, 3:30am IST) and is expected to run through Sunday.