Add Guide to release Apache Airflow Upgrade Check (#14690)
Add Guide to release Apache Airflow Upgrade Check (#14690)

This commit adds guide to release Apache Airflow Upgrade Check
cfei18/incubator-airflow,sekikn/incubator-airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,apache/incubator-airflow,mistercrunch/airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,danielvdende/incubator-airflow,danielvdende/incubator-airflow,mistercrunch/airflow,dhuang/incubator-airflow,sekikn/incubator-airflow,apache/incubator-airflow,danielvdende/incubator-airflow,mistercrunch/airflow,apache/airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,apache/airflow,nathanielvarona/airflow,apache/incubator-airflow,lyft/incubator-airflow,apache/airflow,nathanielvarona/airflow,bolkedebruin/airflow,apache/airflow,Acehaidrey/incubator-airflow,dhuang/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,apache/incubator-airflow,apache/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,dhuang/incubator-airflow,sekikn/incubator-airflow,sekikn/incubator-airflow,lyft/incubator-airflow,Acehaidrey/incubator-airflow,Acehaidrey/incubator-airflow,lyft/incubator-airflow,dhuang/incubator-airflow,mistercrunch/airflow,bolkedebruin/airflow,apache/airflow,bolkedebruin/airflow,bolkedebruin/airflow,lyft/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,bolkedebruin/airflow,danielvdende/incubator-airflow