docs: integrate @nuxt/ui-pro (#739)

Co-authored-by: Pooya Parsa <pooya@pi0.io>
Co-authored-by: Florent Delerue <florentdelerue@hotmail.com>
Co-authored-by: Sébastien Chopin <seb@nuxt.com>

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

@@ -150,4 +150,13 @@ Update your `package.json` to the following:
 }
 ```
 
+```diff [package.json]
+{
+  "devDependencies": {
+-   "@nuxt/ui": "^2.9.0"
++   "@nuxt/ui": "npm:@nuxt/ui-edge@latest"
+  }
+}
+```
+
 Then run `pnpm install`, `yarn install` or `npm install`.