[css-text-4] Markup fix

Author: frivoal

css-text-4/Overview.bs

@@ -224,7 +224,7 @@ Detecting Word Boundaries: the 'word-boundary-detection' property</h4>
 		that is suitable for Chinese in general,
 		it is expected to accept the broad ''auto(zh)'' characterization,
 		as well as any more specific ones,
-		such as ''auto(zh-yue)'', ''auto(zh-Hant-HK)'', ''auto(zh-Hans-SG)'', or ''auto(zh-hak).
+		such as ''auto(zh-yue)'', ''auto(zh-Hant-HK)'', ''auto(zh-Hans-SG)'', or ''auto(zh-hak)''.
 	</div>
 
 	<div class=example>