parca-agent: add nix-update-script

pkgs/by-name/pa/parca-agent/package.nix

@@ -3,6 +3,7 @@
   fetchFromGitHub,
   lib,
   stdenv,
+  nix-update-script,
 }:
 
 buildGoModule rec {
@@ -35,6 +36,8 @@ buildGoModule rec {
     "netgo"
   ];
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "eBPF based, always-on profiling agent";
     homepage = "https://github.com/parca-dev/parca-agent";