[3.13] GH-109975: Announce final release in What's New in Python 3.13 (GH-125007) (#125033)

Prepare What's New in Python 3.13 for final release
(cherry picked from commit 31516c9)

Co-authored-by: Adam Turner <[email protected]>

Author: miss-islington

Diff for: Doc/whatsnew/3.12.rst

@@ -59,7 +59,7 @@ Summary -- Release highlights
 .. This section singles out the most important changes in Python 3.12.
    Brevity is key.
 
-Python 3.12 is the latest stable release of the Python programming language,
+Python 3.12 is a stable release of the Python programming language,
 with a mix of changes to the language and the standard library.
 The library changes focus on cleaning up deprecated APIs, usability, and correctness.
 Of note, the :mod:`!distutils` package has been removed from the standard library.

Diff for: Doc/whatsnew/3.13.rst

@@ -46,7 +46,7 @@
    when researching a change.
 
 This article explains the new features in Python 3.13, compared to 3.12.
-Python 3.13 will be released on October 7, 2024.
+Python 3.13 was released on October 7, 2024.
 For full details, see the :ref:`changelog <changelog>`.
 
 .. seealso::
@@ -60,7 +60,7 @@ Summary -- Release Highlights
 .. This section singles out the most important changes in Python 3.13.
    Brevity is key.
 
-Python 3.13 will be the latest stable release of the Python programming
+Python 3.13 is the latest stable release of the Python programming
 language, with a mix of changes to the language, the implementation
 and the standard library.
 The biggest changes include a new `interactive interpreter