[css-text-3] Yet another markup fix :(

Author: frivoal

css-text-3/Overview.bs

@@ -1207,7 +1207,7 @@ Characters and Letters</h3>
             segment-break-transformation-rules-047.html
             segment-break-transformation-rules-048.html
             segment-break-transformation-rules-049.html
-          <wpt>
+          </wpt>
         <li>Otherwise, if the <a>writing system</a> of the <a>segment break</a>
           is <a for=writing-system>Chinese</a>, <a for=writing-system>Japanese</a>, or Yi,
           and the character before or after the segment break