readme change (#772)

* readme change

* Update README.md

Co-authored-by: Ben Myers <[email protected]>

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Co-authored-by: Ben Myers <[email protected]>

Author: wibjorn

README.md

@@ -6,7 +6,7 @@ Welcome to the Atlas Design project! This repository holds the source code backi
 
 ## Our mission
 
-The Atlas Design System strives to empower designers, PMs, and developers to build accessible, high quality, and consistent experiences at scale across the Microsoft Skilling web properties. Atlas powers [Microsoft Learn](https://learn.microsoft.com) 🤓!
+Atlas strives to empower designers, PMs, and developers to build accessible, high quality, and consistent experiences at scale. Atlas powers [Microsoft Learn](https://learn.microsoft.com) 🤓! We are a CSS-first framework, adding JavaScript only where required for accessibility and behavior.
 
 Looking for information about the Atlas CSS framework? Start in `/css`!