docs: update dark mode

Resolves #697

Author: atinux

Diff for: docs/content/3.examples/2.dark-mode.md

@@ -8,7 +8,7 @@ Live example of dark mode with Nuxt Tailwind.
 
 ---
 
-Example with the [tailwindcss-dark-mode](https://github.com/ChanceArthur/tailwindcss-dark-mode) plugin and [@nuxtjs/color-mode](https://github.com/nuxt-community/color-mode-module) module.
+Example with the [Tailwind Dark Mode](https://tailwindcss.com/docs/dark-mode)  and [@nuxtjs/color-mode](https://github.com/nuxt-modules/color-mode) module.
 
 To make it work hand-in-hand, you need to update your `tailwind.config` to add