mdns-scanner: add passthru.updateScript

pkgs/by-name/md/mdns-scanner/package.nix

@@ -2,6 +2,7 @@
   lib,
   fetchFromGitHub,
   rustPlatform,
+  nix-update-script,
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
@@ -17,6 +18,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
 
   cargoHash = "sha256-n/KVarvd3gcWLYZD5Ww7XoMRHRuTcldxI/HB4Wta5NA=";
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     homepage = "https://github.com/CramBL/mdns-scanner";
     description = "Scan a network and create a list of IPs and associated hostnames, including mDNS hostnames and other aliases";