[css-color-4] clarify currentColor not restricted to sRGB

Author: svgeesus

css-color-4/Overview.bs

@@ -1776,6 +1776,8 @@ The ''transparent'' keyword</h3>
 The ''<color>/currentcolor'' keyword</h3>
 
 	The keyword <dfn value for="<color>">currentcolor</dfn> represents value of the 'color' property on the same element.
+	Unlike <<named-color>>s, it is <em>not</em> restricted to sRGB;
+	the value can be any <<color>>.
 	Its <a>used values</a> is determined by <a href="#resolving-other-colors">resolving color values</a>.
 
 	<wpt>
@@ -4764,6 +4766,7 @@ Changes</h2>
 </h3>
 
 <ul>
+	<li>Clarified that currentColor is not restricted to sRGB</li>
 	<!-- to 3 Feb 2021 -->
 	<li>Small correction to the sRGB to XYZ to sRGB matrices, improve round-tripping</li>
 	<li>Clarified the rec2020 transfer function, citing the correct ITU Rec BT.2020-2 reference</li>
@@ -4801,7 +4804,7 @@ Changes</h2>
 	<li>Added image state (display referred or scene referred) for predefined colorspaces</li>
 	<li>Listed white point correlated color temperature (e.g. D65) alongside chromaticity coordinates, for clarity</li>
 	<li>Clarified that rounding is towards +∞</li>
-	<li>Correction of typos</li>
+	<li>Correction of typos, markup corrections, link fixes</li>
 </ul>
 
 <h3 id="changes-from-20191105" class="no-num">Changes since