update README.md

README.md

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 # gotips Go语言编程技巧
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-8-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-9-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 Go tips from [Phuong Le](https://twitter.com/func25). 
 
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       <td align="center" valign="top" width="14.28%"><a href="https://github.com/devin7788"><img src="https://avatars.githubusercontent.com/u/39721466?v=4?s=100" width="100px;" alt="devin7788"/><br /><sub><b>devin7788</b></sub></a><br /><a href="https://github.com/smallnest/gotips/commits?author=devin7788" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/cannian1"><img src="https://avatars.githubusercontent.com/u/59365095?v=4?s=100" width="100px;" alt="Cannian"/><br /><sub><b>Cannian</b></sub></a><br /><a href="https://github.com/smallnest/gotips/commits?author=cannian1" title="Code">💻</a></td>
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