panache: add update script (#546861)

pkgs/by-name/pa/panache/package.nix

@@ -4,6 +4,7 @@
   fetchFromGitHub,
   installShellFiles,
   versionCheckHook,
+  nix-update-script,
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
@@ -37,6 +38,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
     installManPage target/man/*
   '';
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "Language server, formatter, and linter for Pandoc, Quarto, and R Markdown";
     homepage = "https://github.com/jolars/panache";