build: recommend Python 3.8 to build on Windows

PR-URL: https://github.com/nodejs/node/pull/34182


Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>