Limit astroid version to < 2.12 (#24982)
Limit astroid version to < 2.12 (#24982)

Astroid 2.12 released 9th of July breaks documentation building
with sphinx-autoapi.

Issue about it has been opened in
https://github.com/PyCQA/astroid/issues/1708

Until it is fixed, we should limit astroid.
apache/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,apache/airflow,nathanielvarona/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,apache/airflow,apache/airflow,cfei18/incubator-airflow,apache/airflow,nathanielvarona/airflow,nathanielvarona/airflow,apache/airflow,cfei18/incubator-airflow,nathanielvarona/airflow,nathanielvarona/airflow,cfei18/incubator-airflow