[css-fonts-4] Split changes, to refer to correct WD!

Author: svgeesus

css-fonts-4/Overview.bs

@@ -7404,7 +7404,7 @@ Special thanks to Ilya Grigorik and David Kuettel for their help in developing t
 Changes
 </h2>
 
-<h3 id="changes-2021-07-29">Changes from the <a href="https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/">29 July 2021 Working Draft</a> </h3>
+<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 26 Aug 2022 -->
@@ -7418,7 +7418,12 @@ Changes
 	<li>Added some more explanation to font-palette:light|dark
 	<li>Use last declaration of key/palette index in override-colors
 	<li>Removed currentColor from override-colors example
-	<li>Clarified out of range palette inexes are ignored
+	<li>Clarified that out of range palette indexes are ignored
+</ul>
+
+<h3 id="changes-2021-07-29">Changes from the <a href="https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/">29 July 2021 Working Draft</a> </h3>
+
+<ul>
 	<!--  to 17 Dec 2021 -->
 	<li>Clarified that functions and relative lengths in palettes are evaluated
 		within the root element's context</li>