Name the pin's abort hook in the shipping prerequisites

plans/omarchycn.md

@@ -16,7 +16,7 @@ Progress source of truth for the `omarchycn` branches of `omarchy`, `omarchy-iso
 - The region screen, Rime bundling and local `rime-ice-installer` build exist only on the `omarchycn` branches: a China-ready ISO is built by running `./bin/omarchy-iso-make --local-source ../omarchy ../omarchy-pkgs` from `omarchy-iso/` until they are merged and published.
 - omarchy-pkgs PR 265 (rime-ice-installer) must merge, with `omarchy-offline.patch` upstreamed to manateelazycat/rime-ice-installer, before non-local ISO builds can list it.
 - omarchy-iso PR 210 (stop passing `offline` to archinstall 4.5's `sanity_check`) is cherry-picked on `omarchy-iso/omarchycn`; the edge snapshot already ships archinstall 4.5.
-- A local-source ISO builds `omarchy-dev` and `omarchy-settings-dev` under the published version number, so the next edge release would replace them with builds that lack the China code. Until these branches ship upstream, the ISO pins the local builds with `IgnorePkg` and a `pre-refresh-pacman` hook (omarchy-iso README). Pinned machines get no Omarchy updates.
+- A local-source ISO builds `omarchy-dev` and `omarchy-settings-dev` under the published version number, so the next edge release would replace them with builds that lack the China code. Until these branches ship upstream, the ISO pins the local builds with `IgnorePkg`, a `pre-refresh-pacman` hook and an ALPM hook that aborts any transaction replacing them (omarchy-iso README). Pinned machines get no Omarchy updates.
 - `stable-mirror.omarchy.cn`, `rc-mirror.omarchy.cn` and `mirror.omarchy.cn` must resolve for Arch packages to come from China; until then pacman falls through to `.org`.
 
 ## Tasks