Rename z77z into maggesi

Make the "handle" of the maintainer match the name of the github account.
Also update the email address.

pkgs/development/ocaml-modules/sqlite3/default.nix

@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     platforms = ocaml.meta.platforms or [];
     maintainers = with maintainers; [
-      z77z vbgl
+      maggesi vbgl
     ];
   };
 }