mod_unified_push: fix repo URL

Author: erebion

mod_unified_push/mod_unified_push.spec

@@ -1,5 +1,5 @@
 category: "HTTP"
 summary: "Conversations-compatible UnifiedPush push server implementation"
-url: "git@codeberg.org:itd/mod_unified_push.git"
+url: "git@github.com:processone/ejabberd-contrib.git"
 home: "https://codeberg.org/itd/mod_unified_push"
 author: "itd@net.in.tum.de"