unmaintained/adapta-gtk-theme: move from community

it is orphaned upstream https://github.com/adapta-project/adapta-gtk-theme/commit/51c02f689ccaa5a08bbe317d03c55b49dc4084c8

unmaintained/adapta-gtk-theme: move from community
e863b313 · Natanael Copa · c884cb3c · e863b313
Commit e863b313 authored 4 years ago by Natanael Copa
--- a/community/adapta-gtk-theme/APKBUILD
+++ b/community/adapta-gtk-theme/APKBUILD