Update intro.md

Author: pwizla

docusaurus/docs/dev-docs/intro.md

@@ -7,7 +7,7 @@ sidebar_position: 1
 
 # Welcome to the Strapi Developer Docs!
 
-This documentation contains all technical documentation related to the setup, deployment, update and customization of your Strapi v4 application.
+This documentation contains official technical documentation related to the setup, deployment, update and customization of your Strapi v4 application.
 
 :::strapi Can't wait to start using Strapi?
 You can directly head to the [Quick Start](./quick-start.md)! <br/> If demos are more your thing, we have a [video demo](https://youtu.be/zd0_S_FPzKg), or you can request a [live demo](https://strapi.io/demo)!