updated changes.md [skip ci]
updated changes.md [skip ci]

CesiumGS/cesium,likangning93/cesium,CesiumGS/cesium,likangning93/cesium,likangning93/cesium,YonatanKra/cesium,likangning93/cesium,YonatanKra/cesium,AnalyticalGraphicsInc/cesium,AnalyticalGraphicsInc/cesium,CesiumGS/cesium,progsung/cesium,CesiumGS/cesium,likangning93/cesium,progsung/cesium,YonatanKra/cesium,CesiumGS/cesium,YonatanKra/cesium