felix-fm: add update script

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

pkgs/applications/file-managers/felix-fm/default.nix

@@ -4,6 +4,7 @@
 , pkg-config
 , bzip2
 , libgit2
+, nix-update-script
 , zlib
 , zstd
 , zoxide
@@ -45,6 +46,8 @@ rustPlatform.buildRustPackage rec {
     "--skip=state::tests::test_has_write_permission"
   ];
 
+  passthru.updateScript = nix-update-script { };
+
   meta = with lib; {
     description = "A tui file manager with vim-like key mapping";
     homepage = "https://github.com/kyoheiu/felix";