[css-navigation-1] Fix typo.

Author: dbaron

css-navigation-1/Overview.bs

@@ -33,7 +33,7 @@ url: https://html.spec.whatwg.org/multipage/browsing-the-web.html#has-been-revea
 	type: dfn; spec: html; text: has been revealed;
 </pre>
 
-<h2 id="condional-navigatio-queries">Conditional rules for navigatio queries</h2>
+<h2 id="condional-navigation-queries">Conditional rules for navigation queries</h2>
 
 <h3 id="at-navigation">Navigation queries: the ''@navigation'' rule</h3>