[css-fonts-4] Restore deleted acknowledgement from Fonts 3 on Byzantine seals

Author: svgeesus

css-fonts-4/Overview.bs

@@ -8511,6 +8511,9 @@ Peter Constable for assorted language fixes.
 
 Optical sizing <a href="#optical-size-example">image</a> prepared by Nick Sherman.
 
+John Hudson was kind enough to take the time to explain the subtleties of OpenType language tags 
+and provided the example of character variant usage for displaying text on Byzantine seals.
+
 Special thanks to Tab Atkins Jr.
 for providing the text for the section on <a href="#font-rendering-controls">Font Rendering Controls</a>
 as well as the section on the 'font-display!!descriptor' descriptor.