Merge pull request #192613 from superherointj/broken-mmex

mmex: mark broken

pkgs/applications/office/mmex/default.nix

···
     license = lib.licenses.gpl2Plus;
     maintainers = with lib.maintainers; [viric];
     platforms = with lib.platforms; linux;
+    broken = true; # at 2022-11-23
   };
 }