Moved release note for refs #21281 from "deprecation" to "backwards incompatible".

docs/releases/1.8.txt

@@ -698,6 +698,14 @@ in the view. If you were relying on the fact context data in a
 ``TemplateResponse`` could be overridden using a context processor, you will
 need to change your code.
 
+Overriding ``setUpClass`` / ``tearDownClass`` in test cases
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The decorators :func:`~django.test.override_settings` and
+:func:`~django.test.modify_settings` now act at the class level when used as
+class decorators. As a consequence, when overriding ``setUpClass()`` or
+``tearDownClass()``, the ``super`` implementation should always be called.
+
 Miscellaneous
 ~~~~~~~~~~~~~
 
@@ -1047,14 +1055,6 @@ to construct the "view on site" URL. This URL is now accessible using the
 sure to provide a default value for the ``form_class`` argument since it's
 now optional.
 
-Overriding ``setUpClass`` / ``tearDownClass`` in test cases
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-The decorators :func:`~django.test.override_settings` and
-:func:`~django.test.modify_settings` now act at the class level when used as
-class decorators. As a consequence, when overriding ``setUpClass()`` or
-``tearDownClass()``, the ``super`` implementation should always be called.
-
 ``dirs`` argument of template-finding functions
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~