Update README-CN.md

Author: huangshuwei

README-CN.md

@@ -21,7 +21,7 @@
 - [x] [单元格编辑](http://doc.huangsw.com/vue-easytable/app.html#/table?anchor=table-cell-edit-advanced)
 - [x] [支持单元格合并 (colSpan and rowSpan)](http://doc.huangsw.com/vue-easytable/app.html#/table?anchor=table-cell-merge)
 - [x] [支持 checkbox 多选功能](http://doc.huangsw.com/vue-easytable/app.html#/table?anchor=table-selection-advanced)
-- [x] [footer 汇总功能](http://localhost:63342/vue-easytable/dist/app.html?_ijt=ji129qv629k711n66iq6anenca#/table?anchor=table-footer-summary)  
+- [x] [footer 汇总功能](http://doc.huangsw.com/vue-easytable/app.html#/table?anchor=table-footer-summary)
 - [ ] 添加导出 excel 功能  
 - [ ] 添加导出 pdf 功能  
 - [ ] 添加条件过滤功能