[css-fonts-4] update changes

Author: svgeesus

css-fonts-4/Overview.bs

@@ -7202,6 +7202,7 @@ Changes
 <!-- new ones at the top -->
 
 <ul>
+	<li>Added Graphite reference</li>
 	<li>Added font feature technology keywords opentype, aat, and graphite</li>
 	<!-- to 9 June 2021 -->
 	<li>Removed scary wording about variable fonts being new and experimental</li>