Doc: Replace deprecated param from docstrings (#17709)
Doc: Replace deprecated param from docstrings (#17709)

Follow-up of https://github.com/apache/airflow/pull/16267 . Docstrings should show new values instead of deprecated. (`max_active_tasks` instead of concurency)
mistercrunch/airflow,bolkedebruin/airflow,apache/incubator-airflow,lyft/incubator-airflow,apache/airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,apache/incubator-airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,bolkedebruin/airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,nathanielvarona/airflow,bolkedebruin/airflow,mistercrunch/airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,lyft/incubator-airflow,apache/airflow,apache/airflow,apache/incubator-airflow,Acehaidrey/incubator-airflow,Acehaidrey/incubator-airflow,mistercrunch/airflow,lyft/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,bolkedebruin/airflow,Acehaidrey/incubator-airflow,apache/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,nathanielvarona/airflow,bolkedebruin/airflow,danielvdende/incubator-airflow,apache/airflow,danielvdende/incubator-airflow,mistercrunch/airflow,apache/airflow,apache/incubator-airflow,cfei18/incubator-airflow,Acehaidrey/incubator-airflow