nh: 4.0.0 -> 4.0.3; add changelog

https://github.com/nix-community/nh/compare/v4.0.0...v4.0.2

pkgs/by-name/nh/nh/package.nix

@@ -19,7 +19,7 @@ let
 in
 rustPlatform.buildRustPackage (finalAttrs: {
   pname = "nh";
-  version = "4.0.0";
+  version = "4.0.3";
 
   src = fetchFromGitHub {
     owner = "nix-community";
@@ -64,6 +64,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
   passthru.updateScript = nix-update-script { };
 
   meta = {
+    changelog = "https://github.com/nix-community/nh/blob/${finalAttrs.version}/CHANGELOG.md";
     description = "Yet another nix cli helper";
     homepage = "https://github.com/nix-community/nh";
     license = lib.licenses.eupl12;