ruby-modules: add suffix and gemType in pathDerivation

as required by the changes introduced in
6077061403

pkgs/development/ruby-modules/bundled-common/functions.nix

@@ -80,6 +80,8 @@ in rec {
           outputs = [ "out" ];
           out = res;
           outputName = "out";
+          suffix = version;
+          gemType = "path";
         };
     in res;