docs: fix modify the style generation location (#625)

apps/www/src/content/docs/installation/vite.md

@@ -160,7 +160,7 @@ Which framework are you using? Vite / Nuxt / Laravel
 Which style would you like to use? › Default
 Which color would you like to use as base color? › Slate
 Where is your tsconfig.json or jsconfig.json file? › ./tsconfig.json
-Where is your global CSS file? › › src/index.css
+Where is your global CSS file? › › src/assets/index.css
 Do you want to use CSS variables for colors? › no / yes
 Where is your tailwind.config.js located? › tailwind.config.js
 Configure the import alias for components: › @/components