[css-fonts-4][editorial] Make the abstract suck a bit less

Author: svgeesus

css-fonts-4/Overview.bs

@@ -12,7 +12,7 @@ Previous Version: https://www.w3.org/TR/2024/WD-css-fonts-4-20240201/
 Former Editor: John Daggett, Invited Expert, https://twitter.com/nattokirai, w3cid 41498
 Former Editor: Myles C. Maxfield, Formerly of Apple Inc., mmaxfield@apple.com, w3cid 77180
 Editor: Chris Lilley, W3C, http://svgees.us, w3cid 1438
-Abstract: This specification defines modifications to the existing <a href="https://drafts.csswg.org/css-fonts-3/">CSS Fonts 3</a> specification along with additional features.
+Abstract: This specification defines modifications to the existing <a href="https://drafts.csswg.org/css-fonts-3/">CSS Fonts 3</a> specification along with additional features for font feature control, font variations, and color fonts.
 At Risk: Synthesis of the 'font-variant-position' property
 At Risk: The 'font-language-override!!property' property
 At Risk: The 'font-language-override!!descriptor' descriptor