stig: mark as broken

pkgs/applications/networking/p2p/stig/default.nix

···
     description = "TUI and CLI for the BitTorrent client Transmission";
     homepage = "https://github.com/rndusr/stig";
     license = licenses.gpl3Plus;
+    # Too many broken tests, and it fails to launch
+    broken = true;
     maintainers = with maintainers; [  ];
   };
 }