rsrpc: add updateScript

pkgs/by-name/rs/rsrpc/package.nix

@@ -4,6 +4,7 @@
   rustPlatform,
   openssl,
   pkg-config,
+  nix-update-script,
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
@@ -27,6 +28,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
     openssl
   ];
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     changelog = "https://github.com/SpikeHD/rsRPC/releases/tag/v${finalAttrs.version}";
     description = "Rust implementation of the Discord RPC server";