python311Packages.questionary: add changelog to meta

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

···
   meta = with lib; {
     description = "Python library to build command line user prompts";
     homepage = "https://github.com/tmbo/questionary";
+    changelog = "https://github.com/tmbo/questionary/blob/${src.rev}/docs/pages/changelog.rst";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ fab ];
   };