add work weixin notify desc

notify.md

@@ -518,6 +518,22 @@ acme.sh --set-notify --notify-hook bark
 
 ## 17. Set notification for Gotify
 
+
+## 18. Set notification for work.weixin.qq.com(企业微信)
+
+Send notification to workwx group via webhook api. First create a group robot, get your webhook url, and set a keyword.
+
+推送通知到企业微信群聊天机器人。先在群设置中添加一个群机器人，获得 webhook 地址，并设置一个关键字（目前暂不支持签名模式）。
+
+API说明：https://developer.work.weixin.qq.com/document/path/91770
+
+```sh
+export WEIXIN_WORK_WEBHOOK ='https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=693a91f6-7xxx-4bc4-97a0-0ec2sifa5aaa'
+export WEIXIN_WORK_KEYWORD =acme
+
+acme.sh --set-notify --notify-hook weixin_work
+```
+
 TODO