Add acks for WebKitCSSMatrix changes

Author: zcorpan

geometry/Overview.bs

@@ -1203,13 +1203,16 @@ The following changes were made since the <a href="http://www.w3.org/TR/2014/WD-
 
 The editors would like to thank Robert O’Callahan for contributing to this specification.
 Many thanks to Dean Jackson for his initial proposal of DOMMatrix.
-Thanks to Brian Birtles,
+Thanks to
+Adenilson Cavalcanti,
 Benoit Jacob,
+Boris Zbarsky,
+Brian Birtles,
 Cameron McCormack,
 Domenic Denicola,
 Kari Pihkala,
-Adenilson Cavalcanti,
-Boris Zbarsky
+Max Vujovic,
+Mike Taylor,
 and
-Max Vujovic
+Philip Jägenstedt
 for their careful reviews, comments, and corrections.