concurrently: add update script

pkgs/by-name/co/concurrently/package.nix

@@ -8,6 +8,7 @@
   pnpm_8,
   fetchPnpmDeps,
   pnpmConfigHook,
+  nix-update-script,
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "concurrently";
@@ -67,6 +68,8 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     changelog = "https://github.com/open-cli-tools/concurrently/releases/tag/v${finalAttrs.version}";
     description = "Run commands concurrently";