Update readme for customer case

README.md

 <div align=right>
 
-[主页](https://www.cskefu.com/)　|　[成功案例](https://www.chatopera.com/customer.html)　|　[开发者文档](https://docs.chatopera.com/products/cskefu/osc/index.html)　|　[博客专栏](https://chatopera.blog.csdn.net/)　|　[更新日志](./CHANGELOG.md)　|　[帮助](https://github.com/chatopera/cskefu/issues)
+[主页](https://www.cskefu.com/)　|　[成功案例](#客户案例)　|　[开发者文档](https://docs.chatopera.com/products/cskefu/osc/index.html)　|　[博客专栏](https://chatopera.blog.csdn.net/)　|　[更新日志](./CHANGELOG.md)　|　[帮助](https://github.com/chatopera/cskefu/issues)
 
 </div>