python310Packages.billiard: add changelog to meta

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

···
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-GtLuro4oBT1ym6M3PTTZ1uIQ9uTYvwqcZPkr0FPx7fU=";
+    hash = "sha256-GtLuro4oBT1ym6M3PTTZ1uIQ9uTYvwqcZPkr0FPx7fU=";
   };
 
   nativeCheckInputs = [
···
   meta = with lib; {
     description = "Python multiprocessing fork with improvements and bugfixes";
     homepage = "https://github.com/celery/billiard";
+    changelog = "https://github.com/celery/billiard/blob/v${version}/CHANGES.txt";
     license = licenses.bsd3;
     maintainers = with maintainers; [ ];
   };