passage: add ma27 as maintainer

I've been a long-time `pass(1)` user, but I'm trying to get rid of GPG
personally, so this seems to be the way to go.

pkgs/tools/security/passage/default.nix

···
     description = "Stores, retrieves, generates, and synchronizes passwords securely";
     homepage    = "https://github.com/FiloSottile/passage";
     license     = licenses.gpl2Plus;
-    maintainers = with maintainers; [ kaction ];
+    maintainers = with maintainers; [ kaction ma27 ];
     platforms   = platforms.unix;
     mainProgram = "passage";