The Version should be 2.2.2 instead of 2.2.0.dev0 (#19738)

As during the build of Dockerfile you will be receiving error at 254th i.e the link that is mentioned with the airflow version is not valid

Dockerfile

@@ -33,7 +33,7 @@
 #                        all the build essentials. This makes the image
 #                        much smaller.
 #
-ARG AIRFLOW_VERSION="2.2.0.dev0"
+ARG AIRFLOW_VERSION="2.2.2"
 ARG AIRFLOW_EXTRAS="amazon,async,celery,cncf.kubernetes,dask,docker,elasticsearch,ftp,google,google_auth,grpc,hashicorp,http,ldap,microsoft.azure,mysql,odbc,pandas,postgres,redis,sendgrid,sftp,slack,ssh,statsd,virtualenv"
 ARG ADDITIONAL_AIRFLOW_EXTRAS=""
 ARG ADDITIONAL_PYTHON_DEPS=""