bpo-42523: Fix supported versions in "Using Python on Windows" (GH-23603)

(cherry picked from commit db68544)

Co-authored-by: Zackery Spytz <[email protected]>

Author: miss-islington

Doc/using/windows.rst

@@ -23,8 +23,8 @@ available for application-local distributions.
 
 As specified in :pep:`11`, a Python release only supports a Windows platform
 while Microsoft considers the platform under extended support. This means that
-Python |version| supports Windows Vista and newer. If you require Windows XP
-support then please install Python 3.4.
+Python |version| supports Windows 8.1 and newer. If you require Windows 7
+support, please install Python 3.8.
 
 There are a number of different installers available for Windows, each with
 certain benefits and downsides.