tsx: add update script

pkgs/by-name/ts/tsx/package.nix

@@ -7,6 +7,7 @@
   pnpmConfigHook,
   nodejs_22,
   versionCheckHook,
+  nix-update-script,
 }:
 let
   pnpm' = pnpm_10.override { nodejs = nodejs_22; };
@@ -97,6 +98,8 @@ stdenv.mkDerivation (finalAttrs: {
   doInstallCheck = true;
   versionCheckProgramArg = "--version";
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "TypeScript Execute (tsx): The easiest way to run TypeScript in Node.js";
     homepage = "https://tsx.is";