[mediaqueries] Update link

Author: frivoal

mediaqueries/Overview.bs

@@ -7,7 +7,7 @@ Status: ED
 Work Status: Exploring
 ED: https://drafts.csswg.org/mediaqueries-4/
 TR: http://www.w3.org/TR/mediaqueries-4/
-Previous Version: http://www.w3.org/TR/2016/WD-mediaqueries-4-20160126/
+Previous Version: https://www.w3.org/TR/2016/WD-mediaqueries-4-20160706/
 Editor: Florian Rivoal, Vivliostyle, http://florian.rivoal.net, http://vivliostyle.com, w3cid 43241
 Editor: Tab Atkins Jr., Google, http://xanthir.com/contact/, w3cid 42199
 Former Editor: Håkon Wium Lie, Opera, howcome@opera.com