sync cli docs

Author: svelte-docs-bot[bot]

apps/svelte.dev/content/docs/cli/20-commands/20-sv-add.md

@@ -20,7 +20,7 @@ You can select multiple space-separated add-ons from [the list below](#Official-
 ## Options
 
 - `-C`, `--cwd` — path to the root of your Svelte(Kit) project
-- `--no-preconditions` — skip checking preconditions <!-- TODO what does this mean? -->
+- `--no-git-check` — even if some files are dirty, no prompt will be shown
 - `--install` — installs dependencies with a specified package manager
 - `--no-install` — prevents installing dependencies