Step down as maintainer (pat-s) (#35213)

Follow up to https://gitea.com/gitea/helm-gitea/pulls/918, even though I
didn't contrib a lot to the core repo anyhow.

Signed-off-by: Patrick Schratz <patrick.schratz@gmail.com>

MAINTAINERS

@@ -36,7 +36,6 @@ a1012112796 <1012112796@qq.com> (@a1012112796)
 Karl Heinz Marbaise <kama@soebes.de> (@khmarbaise)
 Norwin Roosen <git@nroo.de> (@noerw)
 Kyle Dumont <kdumontnu@gmail.com> (@kdumontnu)
-Patrick Schratz <patrick.schratz@gmail.com> (@pat-s)
 Janis Estelmann <admin@oldschoolhack.me> (@KN4CK3R)
 Steven Kriegler <sk.bunsenbrenner@gmail.com> (@justusbunsi)
 Jimmy Praet <jimmy.praet@telenet.be> (@jpraet)