[css-color-4] update changes list

Author: svgeesus

css-color-4/Overview.bs

@@ -3183,6 +3183,9 @@ Changes</h2>
 5 November 2019</a></h3>
 
 <ul>
+	<li>Started to describe chroma-reduction gamut mapping rather than per-component clipping</li>
+	<li>Corrected white chromaticity for rec2020</li>
+	<li>Made device-cmyk available by @color-profile; updated CMYK to color algorithm to only use naive conversion as a last resort</li>
 	<li>Added print-oriented CMYK and KCMYOGV examples</li>
 	<li>User-defined colorspaces now dashed-ident, making predefined colorspaces extensible without clashes</li>
 	<li>Added lab option to the color() function</li>
@@ -3196,7 +3199,7 @@ Changes</h2>
 		<a href="#terminology">Color terminology</a> section</li>
 	</li>
 	<li>Add helpful figures and more examples</li>
-	<li>Minor editorial clarifications, bikeshed markup fixes</li>
+	<li>Minor editorial clarifications, fixing typos, bikeshed markup fixes</li>
 </ul>
 
 <h3 id="changes-from-20160705" class='no-num'>Changes since <a href="http://www.w3.org/TR/2016/WD-css-color-4-20160705/">Working Draft of 05 July 2016</a></h3>