Update what's new

dist/preview release/what's new.md

@@ -160,6 +160,8 @@
 
 ### Loaders
 
+- Added missing `loadedAnimationGroups` to `MeshAssetTask` ([bghgary](https://github.com/bghgary))
+
 ## Breaking changes
 
 - `Database.IDBStorageEnabled` is now false by default ([Deltakosh](https://github.com/deltakosh))