Editorial: fix ending tag for report timing dfn

Author: noamr

fetch.bs

@@ -233,7 +233,7 @@ lt="authentication entry">authentication entries</a> (for HTTP authentication).
  <dd>Null or an algorithm accepting a <a for=/>global object</a>.
 </dl>
 
-<p>To <dfn export for="fetch controller" id="finalize-and-report-timing">report timing</a> for a
+<p>To <dfn export for="fetch controller" id="finalize-and-report-timing">report timing</dfn> for a
 <a>fetch controller</a> <var>controller</var> given a <a for=/>global object</a> <var>global</var>:
 
 <ol>