[maintainer update] Python 3.12.8 -> 3.12.9

[Kurt Mosiejczuk]

https://docs.python.org/release/3.12.9/whatsnew/changelog.html#python-3-12-9

Five security fixes along with a whole bunch of others.

I left REVISION at 0 so things will update right even after also updating
-stable.

ok?

--Kurt