dwm-status: add update script

pkgs/applications/window-managers/dwm/dwm-status.nix

@@ -15,6 +15,7 @@
   dnsutils,
   iproute2,
   wirelesstools,
+  nix-update-script,
 }:
 
 let
@@ -59,6 +60,8 @@ rustPlatform.buildRustPackage rec {
     wrapProgram $out/bin/dwm-status --prefix "PATH" : "${lib.makeBinPath bins}"
   '';
 
+  passthru.updateScript = nix-update-script { };
+
   meta = with lib; {
     description = "Highly performant and configurable DWM status service";
     homepage = "https://github.com/Gerschtli/dwm-status";