Fix typo in whatsnew (GH-92488)

Automerge-Triggered-By: GH:ezio-melotti

Author: ezio-melotti

Doc/whatsnew/3.12.rst

@@ -46,7 +46,7 @@
    This saves the maintainer the effort of going through the Mercurial log
    when researching a change.
 
-This article explains the new features in Python 3.12, compared to 3.10.
+This article explains the new features in Python 3.12, compared to 3.11.
 
 For full details, see the :ref:`changelog <changelog>`.