Update 9.20.md

Author: Adam Dupaski

content/en/docs/releasenotes/studio-pro/9/9.20.md

@@ -14,7 +14,7 @@ weight: 80
 
 {{% alert color="info" %}}For more information on this release, see the [Mendix Release 9.20 – Christmas Came Early](https://www.mendix.com/blog/mendix-release-9-20-christmas-came-early/) blog post.{{% /alert %}}
 
-### New Features
+### Improvements
 
 #### Performance Improvements