[css-color-4] Update changes section

Author: svgeesus

css-color-4/Overview.bs

@@ -3113,12 +3113,19 @@ Changes</h2>
 5 November 2019</a></h3>
 
 <ul>
+	<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>
+	<li>Added normative reference for CIE Lab</li>
+	<li>Clarified that prophoto-rgb uses D50 whitepoint so does not require adaptation</li>
+	<li>Clarified direction of increasing angle in LCH</li>
 	<li>Clarified that color names are ACII case insensitive</li>
 	<li>Initial value of the "color" property is now CanvasText</li>
 	<li>Removed confusing gray() function per CSS WG resolution</li>
 	<li>Collect scattered definitions into new
 		<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>
 </ul>