Replace new url for Stable Airflow Docs (#15169)

`https://airflow.apache.org/docs/stable/` -> `https://airflow.apache.org/docs/apache-airflow/stable`

(cherry picked from commit 64b00896d9)

UPDATING.md

@@ -204,7 +204,7 @@ from my_plugin import MyOperator
 
 The name under `airflow.operators.` was the plugin name, where as in the second example it is the python module name where the operator is defined.
 
-See https://airflow.apache.org/docs/stable/howto/custom-operator.html for more info.
+See https://airflow.apache.org/docs/apache-airflow/stable/howto/custom-operator.html for more info.
 
 ### Importing Hooks via plugins is no longer supported
 
@@ -222,7 +222,7 @@ from my_plugin import MyHook
 
 It is still possible (but not required) to "register" hooks in plugins. This is to allow future support for dynamically populating the Connections form in the UI.
 
-See https://airflow.apache.org/docs/stable/howto/custom-operator.html for more info.
+See https://airflow.apache.org/docs/apache-airflow/stable/howto/custom-operator.html for more info.
 
 ### Adding Operators and Sensors via plugins is no longer supported
 

airflow/config_templates/config.yml

@@ -718,7 +718,7 @@
     - name: auth_backend
       description: |
         How to authenticate users of the API. See
-        https://airflow.apache.org/docs/stable/security.html for possible values.
+        https://airflow.apache.org/docs/apache-airflow/stable/security.html for possible values.
         ("airflow.api.auth.backend.default" allows all requests for historic reasons)
       version_added: ~
       type: string

airflow/config_templates/default_airflow.cfg

@@ -384,7 +384,7 @@ fail_fast = False
 enable_experimental_api = False
 
 # How to authenticate users of the API. See
-# https://airflow.apache.org/docs/stable/security.html for possible values.
+# https://airflow.apache.org/docs/apache-airflow/stable/security.html for possible values.
 # ("airflow.api.auth.backend.default" allows all requests for historic reasons)
 auth_backend = airflow.api.auth.backend.deny_all
 

docs/apache-airflow-providers-microsoft-azure/operators/azure_blob_to_gcs.rst

@@ -31,7 +31,7 @@ Please follow Azure
 to do it.
 
 TOKEN should be added to the Connection in Airflow in JSON format, Login and Password as plain text.
-You can check `how to do such connection <https://airflow.apache.org/docs/stable/howto/connection/index.html#editing-a-connection-with-the-ui>`_.
+You can check `how to do such connection <https://airflow.apache.org/docs/apache-airflow/stable/howto/connection/index.html#editing-a-connection-with-the-ui>`_.
 
 See following example.
 Set values for these fields: