update readme

README.md

-## Jumpserver  [English](https://github.com/jumpserver/jumpserver/blob/master/README_EN.md)
+## Jumpserver  
 
 [![Python3](https://img.shields.io/badge/python-3.6-green.svg?style=plastic)](https://www.python.org/)
 [![Django](https://img.shields.io/badge/django-2.1-brightgreen.svg?style=plastic)](https://www.djangoproject.com/)
@@ -8,6 +8,8 @@
 
 ----
 
+- [English Version](https://github.com/jumpserver/jumpserver/blob/master/README_EN.md)
+
 Jumpserver 是全球首款完全开源的堡垒机，使用 GNU GPL v2.0 开源协议，是符合 4A 的专业运维审计系统。
 
 Jumpserver 使用 Python / Django 进行开发，遵循 Web 2.0 规范，配备了业界领先的 Web Terminal 解决方案，交互界面美观、用户体验好。

README_EN.md

-## Jumpserver [中文版](https://github.com/jumpserver/README_EN.md)
+## Jumpserver 
 
 [![Python3](https://img.shields.io/badge/python-3.6-green.svg?style=plastic)](https://www.python.org/)
 [![Django](https://img.shields.io/badge/django-2.1-brightgreen.svg?style=plastic)](https://www.djangoproject.com/)
@@ -8,6 +8,8 @@
 
 ----
 
+- [中文版](https://github.com/jumpserver/jumpserver/blob/master/README_EN.md)
+
 Jumpserver is the first fully open source bastion in the world, based on the GNU GPL v2.0 open source protocol. Jumpserver is a  professional operation and maintenance audit system conforms to 4A specifications.
 
 Jumpserver is developed using Python / Django, conforms to the Web 2.0 specification, and is equipped with the industry-leading Web Terminal solution which have beautiful interface and great user experience.