[3.12] GH-95913: Add the release date for Python 3.11 (GH-109750) (#109771)

GH-95913: Add the release date for Python 3.11 (GH-109750)
(cherry picked from commit b10de68)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>

Author: miss-islington

Doc/whatsnew/3.11.rst

@@ -45,7 +45,7 @@
    when researching a change.
 
 This article explains the new features in Python 3.11, compared to 3.10.
-
+Python 3.11 was released on October 24, 2022.
 For full details, see the :ref:`changelog <changelog>`.
 
 

Doc/whatsnew/3.9.rst

@@ -44,7 +44,6 @@
 
 This article explains the new features in Python 3.9, compared to 3.8.
 Python 3.9 was released on October 5, 2020.
-
 For full details, see the :ref:`changelog <changelog>`.
 
 .. seealso::