calligraphy: add update-script

pkgs/by-name/ca/calligraphy/package.nix

@@ -9,6 +9,7 @@
   wrapGAppsHook4,
   desktop-file-utils,
   libadwaita,
+  nix-update-script,
 }:
 
 python3Packages.buildPythonApplication rec {
@@ -46,6 +47,8 @@ python3Packages.buildPythonApplication rec {
 
   makeWrapperArgs = [ "\${gappsWrapperArgs[@]}" ];
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "GTK tool turning text into ASCII banners";
     homepage = "https://calligraphy.geopjr.dev";