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

Author: svgeesus

css-color-5/Overview.bs

@@ -2961,8 +2961,14 @@ No new privacy considerations have been reported on this specification.
 </h3>
 
 <ul>
+	<!-- to 30 Aug 2023 -->
+	<li>Corrected color-mix percent normalization algorithm to include explicit 50% edge case</li>
+	<li>Updated HSL example which still used gamut mapping before sRGB to HSL conversion step</li>
+	<li>Fixed syntax highlighting in some examples</li>
+	<li>Clarified that RCS origin colors can include optional alpha</li>
+	<li>Fixed erroneous use of powerless components</li>
 	<!-- to 1 July 2023 -->
-	<li>Use reference ranges for percent to number conversions</li>
+	<li>Used reference ranges for percent to number conversions</li>
 	<li>Made ''hsl()'' and ''hwb()'' channel values number, per CSSWG 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>