docs(desktop): document Umbriel compositor configuration

docs/chezmoi/scripts.mdx

@@ -49,7 +49,7 @@ Seven scripts run during `chezmoi apply`. Five live in `.chezmoiscripts/`, a dir
 
 1. Uses `pacman` directly when running as root, otherwise `sudo pacman`.
 2. `pacman -T` filters each list down to names no installed package provides (so `mise-bin` satisfies `mise`, `yazi-git` satisfies `yazi`), then `pacman -S --needed --noconfirm` installs the rest of `packages.arch.pacman`.
-3. For roles `desktop` and `laptop`, the same for `packages.arch.desktop.pacman`, and, when `pacman-conf -l` lists an `omarchy` repo, for `packages.arch.desktop.omarchy`.
+3. For roles `desktop` and `laptop`, the same for `packages.arch.desktop.pacman`, and for `packages.arch.desktop.omarchy` / `packages.arch.desktop.cachyos` when `pacman-conf -l` lists an `omarchy` / `cachyos` repo.
 4. Builds the AUR list: `packages.arch.desktop.aur` plus `packages.arch.aur` for `desktop`/`laptop`, only `packages.arch.aur` for other roles, then drops every name `pacman -T` says is already provided. Desktop apps already installed from a sync repo (CachyOS, `[omarchy]`) are therefore neither rebuilt nor replaced.
 5. If anything is left and neither `yay` nor `paru` is installed, bootstraps `yay`: from a sync repo when `pacman -Si yay` finds one (CachyOS, chaotic-aur), otherwise by building `yay-bin` from the AUR with `makepkg -si` (installs `git` and `base-devel` first; skipped as root, since makepkg refuses root).
 6. Runs `yay -S --needed --noconfirm` on the remaining names, falling back to `paru`. yay prefers a sync repo over the AUR when both have the name. If no helper could be bootstrapped it prints `warning: no yay/paru and none could be bootstrapped — skipping AUR packages: …` and continues.