python3Packages.textual: unbreak

pkgs/development/python-modules/textual/default.nix

···
     changelog = "https://github.com/Textualize/textual/blob/${src.tag}/CHANGELOG.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ gepbird ];
-    # https://github.com/Textualize/textual/issues/5868
-    broken = true;
   };
 }