[css-color-adjust-1] Update changes list

Author: fantasai

css-color-adjust-1/Overview.bs

@@ -560,6 +560,9 @@ Changes {#changes}
 	<ul>
 		<li>Forced background colors don't revert, they force all color channels other than alpha (to preserve author’s transparency).
 			<a href="https://github.com/w3c/csswg-drafts/issues/4175">Issue 4175</a>.
+		<li>Other properties revert by rewriting author-level rules to specify ''revert'',
+			not by injecting ''revert !important'' rules into the cascade.
+			<a href="https://github.com/w3c/csswg-drafts/issues/4020">Issue 4020</a>.
 		<li>Force opaque background if color-adjust mismatches between <{iframe}> and embedded document.
 			<a href="https://github.com/w3c/csswg-drafts/issues/4472">Issue 4472</a>.
 		<li>Don't force colors on SVG text.