[Docs] Update CLI options while configuring components.json (#2283)

New Line added to the docs.
Just for the consistency.

![image](https://github.com/shadcn-ui/ui/assets/94120295/e0da71c1-72d1-4e5d-bba9-54634a9d0e31)

apps/www/content/docs/installation/next.mdx

@@ -31,6 +31,7 @@ Which style would you like to use? › Default
 Which color would you like to use as base color? › Slate
 Where is your global CSS file? › › app/globals.css
 Do you want to use CSS variables for colors? › no / yes
+Are you using a custom tailwind prefix eg. tw-? (Leave blank if not) ...
 Where is your tailwind.config.js located? › tailwind.config.js
 Configure the import alias for components: › @/components
 Configure the import alias for utils: › @/lib/utils