[cssom] (editorial) Mute bikeshed error for CSSFontFaceRule ref

Author: zcorpan

cssom/Overview.bs

@@ -14,7 +14,7 @@ Editor: Glenn Adams, Cox Communications, Inc. http://www.cox.com, glenn.adam
 Former Editor: Anne van Kesteren, Opera Software ASA http://www.opera.com, annevk@annevk.nl, https://annevankesteren.nl/
 !Issues list: <a href="https://www.w3.org/Bugs/Public/buglist.cgi?product=CSS&amp;component=CSSOM&amp;resolution=---">Bugzilla</a> (<a href="https://www.w3.org/Bugs/Public/enter_bug.cgi?product=CSS&amp;component=CSSOM">file a bug</a>)
 Abstract: CSSOM defines APIs (including generic parsing and serialization rules) for Media Queries, Selectors, and of course CSS itself.
-Ignored Terms: EmptyString, mediaText, cssText, InvalidCharacterError, SecurityError, SyntaxError, IndexSizeError, HierarchyRequestError, InvalidStateError, InvalidModificationError, NoModificationAllowedError, CORS-same-origin, group of selectors, list of css page selectors, CSSCharsetRule, ProcessingInstruction, EventTarget, EventListener, Event, EventInit, Element, Range, Node, Text, style
+Ignored Terms: EmptyString, mediaText, cssText, InvalidCharacterError, SecurityError, SyntaxError, IndexSizeError, HierarchyRequestError, InvalidStateError, InvalidModificationError, NoModificationAllowedError, CORS-same-origin, group of selectors, list of css page selectors, CSSCharsetRule, ProcessingInstruction, EventTarget, EventListener, Event, EventInit, Element, Range, Node, Text, style, CSSFontFaceRule
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