[css-cascade-4] Link to affected text from changes list.

Author: fantasai

css-cascade-4/Overview.bs

@@ -1256,7 +1256,8 @@ Changes Since the 28 August 2018 Candidate Recommendation</h3>
 				(for example, by a <code>style</code> attribute).</ins></p>
 			</blockquote>
 		<li id="change-2020-origins">
-			Clarify origin comparison for quirks mode Content-Type assumptions.
+			Clarify origin comparison for quirks mode Content-Type assumptions
+			in [[#content-type]].
 			(<a href="https://github.com/w3c/csswg-drafts/issues/4838">Issue 4838</a>)
 	</ul>