docs: update warning for npm users

docs/content/docs/1.getting-started/2.installation/1.nuxt.md

@@ -42,7 +42,7 @@ bun add @nuxt/ui
 ::
 
 ::warning
-If you're using **pnpm**, ensure that you either set [`shamefully-hoist=true`](https://pnpm.io/npmrc#shamefully-hoist) in your `.npmrc` file or install `tailwindcss` in your project's root directory.
+If you're using **pnpm**, ensure that you either set [`shamefully-hoist=true`](https://pnpm.io/npmrc#shamefully-hoist) in your `.npmrc` file or install `tailwindcss` in your project's root directory. If you're using **npm**, install `tailwindcss` in your project's root directory.
 ::
 
 #### Add the Nuxt UI module in your `nuxt.config.ts`{lang="ts-type"}