python310Packages.xhtml2pdf: add changelog to meta

pkgs/development/python-modules/xhtml2pdf/default.nix

···
 
   disabled = pythonOlder "3.7";
 
-  # Tests are only available on GitHub
   src = fetchFromGitHub {
     owner = pname;
     repo = pname;
-    # Currently it is not possible to fetch from version as there is a branch with the same name
     rev = "refs/tags/v${version}";
     hash = "sha256-L/HCw+O8bidtE5nDdO+cLS54m64dlJL+9Gjcye5gM+w=";
   };
···
   meta = with lib; {
     description = "A PDF generator using HTML and CSS";
     homepage = "https://github.com/xhtml2pdf/xhtml2pdf";
+    changelog = "https://github.com/xhtml2pdf/xhtml2pdf/releases/tag/v${version}";
     license = licenses.asl20;
     maintainers = with maintainers; [ ];
   };