[css-display-3] Add Oriol to the acknowledgements.

Author: fantasai

css-display-3/Overview.bs

@@ -1111,7 +1111,7 @@ Acknowledgments</h2>
 	but primed us for the current spec,
 	and Anton Prowse,
 	whose relentless assault on CSS2.1 Chapter 9 forced some order out of the chaos.
-	Honorable mentions also go to David Baron, Mats Palmgren, and Boris Zbarsky for their feedback.
+	Honorable mentions also go to David Baron, Oriol Brufau, Mats Palmgren, and Boris Zbarsky for their feedback.
 
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 	We would also like to thank the many JavaScript libraries such as jQuery