Add Changelog

CHANGELOG.en-US.md

@@ -42,6 +42,7 @@ If you want to read change logs before `2.0.0`, please visit [GitHub](https://gi
 * Added less variables: `@border-style-base` `@border-width-base` `@btn-danger-color` `@btn-danger-bg` and etc.
 * Fixed Badge misplace issue when browser zoom above 100%. [#4747](https://github.com/ant-design/ant-design/issues/4747) [#4290](https://github.com/ant-design/ant-design/issues/4290)
 * Fixed a mis-align issue of fixed header Table. [#4750](https://github.com/ant-design/ant-design/issues/4750)
+* Fixed Table scrolling lag issue in IE. [#4522](https://github.com/ant-design/ant-design/issues/4522)
 
 ## 2.6.4
 

CHANGELOG.zh-CN.md

@@ -43,6 +43,7 @@ timeline: true
 * 新增 less 变量: `@border-style-base` `@border-width-base` `@btn-danger-color` `@btn-danger-bg` 等。
 * 修复了 Badge 在页面放大时错位的问题。[#4747](https://github.com/ant-design/ant-design/issues/4747) [#4290](https://github.com/ant-design/ant-design/issues/4290)
 * 修复一个固定表头的表格错位问题。[#4750](https://github.com/ant-design/ant-design/issues/4750)
+* 修复一个 IE 下表格滚动时卡顿的问题。[#4522](https://github.com/ant-design/ant-design/issues/4522)
 
 ## 2.6.4