[css-fonts-4][editorial] Update changes

Author: svgeesus

css-fonts-4/Overview.bs

@@ -8853,7 +8853,8 @@ Changes
 <h3 id="changes-2021-12-21">Changes from the <a href="https://www.w3.org/TR/2021/WD-css-fonts-4-20211221/">21 December 2021 Working Draft</a> </h3>
 
 <ul>
-	<!-- to 30 Jan 2024 -->
+	<!-- to 31 Jan 2024 -->
+	<li>Corrected some broken links</li>
 	<li>In font matching algorithm, distinguished use of varfont slnt axis from synthetic obliquing</li>
 	<li> Clarified that font variations do not count as font synthesis</li>
 	<li>Clarified the effect of auto values on @font-face is to select the appropriate "normal" value</li>