[css-fonts-4] Update changes since last WD

Author: svgeesus

css-fonts-4/Overview.bs

@@ -6695,11 +6695,23 @@ Special thanks to Ilya Grigorik and David Kuettel for their help in developing t
 Changes
 </h2>
 
-<h3 id="changes-2020-11-17">Changes from the <a href="https://www.w3.org/TR/2020/WD-css-fonts-4-20201117/">17 November 2020 Working Draft</a> </h3><!-- See https://github.com/w3c/csswg-drafts/commits/master/css-fonts-4/Overview.bs -->
+<h3 id="changes-2020-11-17">Changes from the <a href="https://www.w3.org/TR/2020/WD-css-fonts-4-20201117/">17 November 2020 Working Draft</a> </h3><!-- See https://github.com/w3c/csswg-drafts/commits/main/css-fonts-4/Overview.bs -->
 <!-- new ones at the top -->
 
 <ul>
+	<!-- to 29 May 2021 -->
+	<li>Clarify well-designed vs badly-designed icon fonts in terms of Unicode codepoints</li>
+	<li>Added Accessibility Considerations section</li>
+	<li>Clarified that font-optical-sizing interacts with font-size-adjust</li>
+	<li>Used consistent capitalization for "user agent"</li>
+	<li>Clarified that font-stretch should serialize to a number/percentage, not a keyword</li>
+	<li>Suggested heuristics for loading ''optional'' fonts </li>
+	<li>Clarified repeated items in grammars</li>
+	<li>Replaced obsolete “potentially CORS-enabled fetch” with reference to Fetch</li>
+	<li>Added missing small-caps value to font-synthesis</li>
+	<li>Be explicit about which properties apply to text</li>
 	<li>Updated links</li>
+	<li>Fixed typos, syntax errors</li>
 </ul>
 
 <h3 id="changes-2019-11-13">Changes from the <a href="https://www.w3.org/TR/2019/WD-css-fonts-4-20191113/">13 November 2019