Updated some broken links in conferences (reactjs#2407)

Updated the broken links of  React.js Conf 2016 (February 22 & 23 in San Francisco, CA)

Author: rokibulislaam

content/community/conferences.md

@@ -85,7 +85,7 @@ November 2-4 in Bratislava, Slovakia
 ### React.js Conf 2016 {#reactjs-conf-2016}
 February 22 & 23 in San Francisco, CA
 
-[Website](http://conf.reactjs.com/) - [Schedule](http://conf.reactjs.com/schedule.html) - [Videos](https://www.youtube.com/playlist?list=PLb0IAmt7-GS0M8Q95RIc2lOM6nc77q1IY)
+[Website](http://conf2016.reactjs.org/) - [Schedule](http://conf2016.reactjs.org/schedule.html) - [Videos](https://www.youtube.com/playlist?list=PLb0IAmt7-GS0M8Q95RIc2lOM6nc77q1IY)
 
 ### React Amsterdam 2016 {#react-amsterdam-2016}
 April 16 in Amsterdam, The Netherlands