Merge pull request #230365 from carlthome/enable-nikola-on-macos

python3Packages.nikola: enable on darwin

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

···
     changelog = "https://github.com/getnikola/nikola/blob/v${version}/CHANGES.txt";
     license = licenses.mit;
     maintainers = with maintainers; [ jluttine ];
-    # All tests fail
-    broken = stdenv.isDarwin;
   };
 }