Update readme_zh.md

Author: kamilmysliwiec

readme_zh.md

@@ -1,6 +1,5 @@
 <p align="center">
-  <a href="http://nestjs.com/" target="blank"><img src="http://kamilmysliwiec.com/public/nest-logo.png#1" alt="Nest Logo" /></a>
-</p>
+  <a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo_text.svg" width="320" alt="Nest Logo" /></a>
 
 [travis-image]: https://api.travis-ci.org/nestjs/nest.svg?branch=master
 [travis-url]: https://travis-ci.org/nestjs/nest