[css-color-5][editorial] Update changes

Author: svgeesus

css-color-5/Overview.bs

@@ -2957,6 +2957,11 @@ No new privacy considerations have been reported on this specification.
 </h3>
 
 <ul>
+	<!-- to 1 July 2023 -->
+	<li>Use reference ranges for percent to number conversions</li>
+	<li>Made ''hsl()'' and ''hwb()'' channel values number, per CSSSWG resolution. 
+		Also made all the hue angle channel values number, in degrees. 
+		The RCS intro already said this but the change had not been fully propagated.</li>
 	<!-- to 28 June 2023 -->
 	<li>Added an RCS example in CIE XYZ D65 colorspace</li>
 	<li>Removed un-needed and unchanged copy of a section of CSS Color 4 which was confusing to read</li>