xh: add updateScript

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

@@ -8,6 +8,7 @@
   stdenv,
   openssl,
   versionCheckHook,
+  nix-update-script,
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
@@ -63,6 +64,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
   nativeInstallCheckInputs = [ versionCheckHook ];
   versionCheckProgramArg = "--version";
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "Friendly and fast tool for sending HTTP requests";
     homepage = "https://github.com/ducaale/xh";