Update CHANGE-LOG.md

Author: huangshuwei

CHANGE-LOG.md

@@ -7,6 +7,20 @@ Vx.x.x(TPL)
 -   Style changes
 -   Dependencies Changes
 
+V2.21.7
+
+### Bug Fixes
+
+-   Fix the bug that cell selection is enabled in the parent table and cell text cannot be selected in the child table by default when nested child tables
+-   Fix the bug that the parent table height jitter after expanding when nested sub tables
+
+---
+
+### Bug Fixes
+
+-   修复嵌套子表格时，父表格开启了单元格选择，子表格默认无法选中单元格文字的问题
+-   修复嵌套子表格时，展开后父级表格高度抖动的问题
+
 V2.21.6
 
 ### Bug Fixes