Updated link in README to reflect new stats on iOS 6 adoption

Author: Ricardo Nunez

README.md

@@ -22,7 +22,7 @@ See the [website](http://www.jessesquires.com/JSQMessagesViewController/) for th
 * iOS 7.0+
 * ARC
 
-*Need support for iOS 6? [You shouldn't](http://www.macrumors.com/2014/07/14/apple-ios-7-adoption-90-percent/). But, there's a branch for that!*
+*Need support for iOS 6? [You shouldn't](http://www.macrumors.com/2014/11/11/ios8-56-percent-adoption/). But, there's a branch for that!*
 ````
 git checkout iOS6_support_stable
 ````