Prettified Code!

Author: hengyunabc

site/docs/en/doc/contact-us.md

@@ -22,7 +22,6 @@ Questions about how to use Arthas and opinions can be directly raised in issues
 
 ![](/images/dingding4_qr.png)
 
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 ### Instructions for Installing DingTalk
 
 DingTalk can be downloaded from: [https://www.dingtalk.com/en](https://page.dingtalk.com/wow/dingtalk/act/en-download)