[css-color-adjust-1] Update Changes list.

Author: fantasai

css-color-adjust-1/Overview.bs

@@ -551,6 +551,20 @@ Acknowledgements {#acknowledgements}
 Changes {#changes}
 =======
 
+	Changes since the <a href="https://www.w3.org/TR/2020/WD-css-color-adjust-1-20200402/">2 April 2020 Working Draft</a>:
+
+	<ul>
+		<li>Removed the <css>only</css> keyword.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/3881">Issue 3881</a>)
+		<li>Moved the definition of the <code>color-scheme</code> <{meta}> value to the [[HTML]] specification.
+		<li>Added 'color-scheme' to list of properties affected by [=forced colors mode=].
+		(<a href="https://github.com/w3c/csswg-drafts/issues/3885">Issue 3885</a>)
+		<li>Exempted properties already set as system colors from color forcing.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/4178">Issue 4178</a>)
+		<li>Switched color forcing to a [=used value=] rather than [=computed value=] operation.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/4915">Issue 4915</a>)
+	</ul>
+
 	Changes since the <a href="https://www.w3.org/TR/2019/WD-css-color-adjust-1-20190523/">23 May 2019 Working Draft</a>:
 
 	<ul>