[css-color-5][editorial] Corrected name in acknowledgments, at their request

Author: svgeesus

css-fonts-5/Overview.bs

@@ -730,7 +730,7 @@ Acknowledgments</h2>
 	<a href="https://www.w3.org/TR/css-fonts-4/#acknowledgments">contributors to the previous level of this module</a>.
 
 	Secondly, we would like to acknowledge
-	DerKoun from PDFReactor,
+	Bernhard Fey from RealObjects,
 	Xiaocheng Hu from Google,
 	and
 	Jonathan Kew from Mozilla,