文档添加应用市场链接

Signed-off-by: 聆听 <sugar1569@vip.qq.com>

README.md

@@ -29,7 +29,8 @@ CRMEB开源商城系统PHP版
 
 [官网](https://www.crmeb.com/) |
 [在线体验](http://v4.crmeb.net/admin/) |
-[帮助文档](https://doc.crmeb.com/single/crmeb_v4) |
+[帮助文档](https://doc.crmeb.com/single/v53/) |
+[应用市场](https://www.crmeb.com/market/)
 [技术社区](https://www.crmeb.com/ask/)
 
 [comment]: <> ([宽屏预览]&#40;https://gitee.com/ZhongBangKeJi/CRMEB/blob/master/README.md&#41;)