[css-conditional-4][editorial] Clean up remaining incorrect auto-links, fix w3c#8433

Author: svgeesus

css-conditional-4/Overview.bs

@@ -21,7 +21,8 @@ Abstract: This module contains the features of CSS
 	the style sheet is being applied in.
 	It includes and extends the functionality of CSS Conditional 3 [[!css-conditional-3]],
 	adding the ability to query support for particular selectors [[SELECTORS-4]]
-	through the new ''selector()'' notation for [=supports queries=].
+	through the new 
+	<a href="#typedef-supports-selector-fn">''selector()''</a> notation for [=supports queries=].
 Default Highlight: css
 WPT Path Prefix: css/css-conditional/
 WPT Display: open
@@ -182,7 +183,7 @@ Changes since the <a href="https://www.w3.org/TR/2020/WD-css-conditional-4-20200
 			applies to selectors inside selector() (<a href="https://github.com/w3c/csswg-drafts/issues/3220">Issue 3220</a>)</li>
 	</ul>
 
-<h3 id="changes-from-L4" class="no-num">
+<h3 id="changes-from-L3" class="no-num">
 Additions since Level 3</h3>
 
 	<ul>