update the file for 1.0rc1.

@@ -3,10 +3,10 @@
 SRS定位是运营级的互联网直播服务器集群，追求更好的概念完整性和最简单实现的代码。
 
 下载发布版(github): 
-[Centos6-x86_64](http://winlinvip.github.io/srs.release/releases/files/SRS-CentOS6-x86_64-1.0.0.zip) 
+[Centos6-x86_64](http://winlinvip.github.io/srs.release/releases/files/SRS-CentOS6-x86_64-1.0.21.zip) 
 其他[more...](http://winlinvip.github.io/srs.release/releases/) <br/>
 下载发布版(国内阿里云镜像): 
-[Centos6-x86_64](http://www.ossrs.net/srs.release/releases/files/SRS-CentOS6-x86_64-1.0.0.zip) 
+[Centos6-x86_64](http://www.ossrs.net/srs.release/releases/files/SRS-CentOS6-x86_64-1.0.21.zip) 
 其他[more...](http://www.ossrs.net/srs.release/releases/)<br/>
 QQ群: 365936885, by wenjie <br/>
 同类产品：[BLS](https://github.com/wenjiegit/Bull-Live-Server)/[BLE](https://github.com/wenjiegit/Bull-Live-Encoder), [NGINX-RTMP](https://github.com/arut/nginx-rtmp-module), [CRTMPD](http://www.rtmpd.com/), [RED5](http://www.red5.org/), [WOWZA](http://www.wowza.com/), [FMS/AMS](http://www.adobe.com/products/adobe-media-server-standard.html)