GH-95172 Make the same version `versionadded` oneline (GH-95172)

* Make the same version versionadded oneline

* Format versionadded for enum.rst

* Format versionadded

A single line versionadded was reading better.

Co-authored-by: Senthil Kumaran <senthil@python.org>
(cherry picked from commit d6062d1170199c4f02acf6de8fcbf5d748a03db2)

Co-authored-by: 180909 <734461790@qq.com>