Update what's new.md (#18)

dist/preview release/what's new.md

@@ -58,6 +58,7 @@
 - Removed all references to HTML element from cameras' attach and detach control functions ([RaananW](https://github.com/RaananW))
 - Added `boundingBoxRenderer.onResourcesReadyObservable` ([aWeirdo](https://github.com/aWeirdo))
 - Added `copyTools.GenerateBase64StringFromTexture` ([aWeirdo](https://github.com/aWeirdo))
+- Updated `axisScaleGizmo` to follow pointer on drag ([aWeirdo](https://github.com/aWeirdo))
 
 ### Engine