gajim: add hlad as maintainer

Author: hlad

pkgs/applications/networking/instant-messengers/gajim/default.nix

@@ -139,6 +139,7 @@ python3.pkgs.buildPythonApplication rec {
     maintainers = with lib.maintainers; [
       raskin
       abbradar
+      hlad
     ];
     downloadPage = "http://gajim.org/download/";
     platforms = lib.platforms.linux;