Apply to became a maintainer. (#25745)

Hi Gitea Team, 
I would like to apply as a maintainer.
I don't have that much in-depth knowledge of the codebase, but I would
like to help to review PRs for the beginning in my free time and
contribute in frontend, backend tasks and new proposals.

Here is my PR list:-
https://github.com/go-gitea/gitea/pulls?q=is%3Apr+author%3Apuni9869+is%3Amerged+

MAINTAINERS

 Gary Moon <gary@garymoon.net> (@garymoon)
 Philip Peterson <philip.c.peterson@gmail.com> (@philip-peterson)
 Denys Konovalov <kontakt@denyskon.de> (@denyskon)
+Punit Inani <punitinani1@gmail.com> (@puni9869)