dnf4: add update script

Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>

pkgs/development/python-modules/dnf4/default.nix

@@ -8,6 +8,7 @@
 , python
 , rpm
 , sphinx
+, nix-update-script
 }:
 
 let
@@ -88,6 +89,8 @@ buildPythonPackage rec {
     moveToOutput "lib/${python.libPrefix}" "$py"
   '';
 
+  passthru.updateScript = nix-update-script { };
+
   meta = with lib; {
     description = "Package manager based on libdnf and libsolv. Replaces YUM";
     homepage = "https://github.com/rpm-software-management/dnf";