Update URLs after migrating from pagure.io

mkit.ini

     name        = imapdomo
     pkgname     = imapdomo
     maintainer  = Alois Mahdal <netvor+imapdomo@vornet.cz>
-    vcs_browser = https://pagure.io/imapdomo
+    vcs_browser = https://gitea.vornet.cz/netvor/imapdomo
     tagline     = imapfilter convenience wrapper
     relsrc      = master
     reldst      = latest