python3Packages.jianpu-ly: add meta.changelog

pkgs/development/python-modules/jianpu-ly/default.nix

···
   meta = {
     homepage = "https://ssb22.user.srcf.net/mwrhome/jianpu-ly.html";
     description = "Assists with printing jianpu";
+    changelog = "https://github.com/ssb22/jianpu-ly/releases/tag/v${version}";
     license = lib.licenses.asl20;
     maintainers = with lib.maintainers; [ ifurther ];
   };