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

Author: svgeesus

css-fonts-4/Overview.bs

@@ -8849,6 +8849,20 @@ 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 -->
+	<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>
+	<li>Improved font fallback on font-variant-emoji with variation selectors</li>
+	<li>Clarified that the oblique angle must be the same sign as requested</li>
+	<li>Defined synthetic oblique in vertical text</li>
+	<li>Used CSS Color 5 absolute color definition for override-colors</li>
+	<li>Made font-stretch a legacy name alias for font-width</li>
+	<li>The palette-mix() grammar requires color-interpolation-method, so removed leftover prose defining what to do if it is omitted</li>
+	<li>Add more generics samples, for fang song and kai</li>
+	<li>Listed fonts used for Urdu samples</li>
+	<li>Users must be able to modify the set of installed fonts available for rendering web pages</li>
+	<li>Added examples of Urdu text in nastaliq and in fallback naskh fonts</li>
 	<!-- to  5 Dec 2023 -->
 	<li>Clarified that keywords inside local() are an error</li>
 	<li>Clarified that the system-ui generic font family may be composite, and is affected by unicode coverage and content language</li>