[css-lists-3] Update Changes list.

Author: fantasai

css-lists-3/Overview.bs

@@ -1463,6 +1463,12 @@ Acknowledgments</h2>
 
 This section documents the changes since previous publications.
 
+<h3 id="changes-20140320">Changes since the 25 April 2019 WD</h3>
+
+	<ul>
+		<li>Rewrite the [[#auto-numbering]] section for better precision, editorial clarity, and synchronization with CSS2.
+	</ul>
+
 <h3 id="changes-20140320">Changes since the 20 March 2014 WD</h3>
 
 	<ul>