Update CHANGES.md
Update CHANGES.md

Co-authored-by: Janine Liu <f79a3ed70eefc8437b09acfab002c222da2f2041@users.noreply.github.com>
CesiumGS/cesium,CesiumGS/cesium,CesiumGS/cesium,CesiumGS/cesium,CesiumGS/cesium