update logo link

yofine · yofine · commit 1b4a62a52f5c · 2017-04-25T02:19:49.000+08:00
diff --git a/_coverpage.md b/_coverpage.md
@@ -1,6 +1,6 @@
 <!-- _coverpage.md -->
 
-![logo](https://facebook.github.io/react-vr/img/header_logo.png)
+![logo](http://7xwo1c.com1.z0.glb.clouddn.com/header_logo.png)
 
 # ReactVR 中文文档
 
