Fixes dead links to Django's logging config docs (GH-20823)

Fixes two outdated URLs to point at the current "stable" version of Django's logging documentation.

Automerge-Triggered-By: @vsajip

Author: kevinseelbach

Doc/howto/logging-cookbook.rst

@@ -1368,7 +1368,7 @@ An example dictionary-based configuration
 -----------------------------------------
 
 Below is an example of a logging configuration dictionary - it's taken from
-the `documentation on the Django project <https://docs.djangoproject.com/en/1.9/topics/logging/#configuring-logging>`_.
+the `documentation on the Django project <https://docs.djangoproject.com/en/stable/topics/logging/#configuring-logging>`_.
 This dictionary is passed to :func:`~config.dictConfig` to put the configuration into effect::
 
     LOGGING = {
@@ -1424,7 +1424,7 @@ This dictionary is passed to :func:`~config.dictConfig` to put the configuration
     }
 
 For more information about this configuration, you can see the `relevant
-section <https://docs.djangoproject.com/en/1.9/topics/logging/#configuring-logging>`_
+section <https://docs.djangoproject.com/en/stable/topics/logging/#configuring-logging>`_
 of the Django documentation.
 
 .. _cookbook-rotator-namer: