Subject: 29.0.50; Update gnus info nodes to explain current versioning

From: Stefan Kangas <[email-masked]>
Date: Thu, 29 Sep 2022 07:01:03 -0700

Severity: wishlist

These info nodes should probably be updated to reflect that development
is now taking place in the Emacs git repository:

    (info "(gnus) Gnus Versions")
    (info "(gnus) Ma Gnus")

While we're here, should the Gnus version be bumped from 5.13 at some
point?