Correcting error for Find Element From Shadow Root

Author: jimevanssfdc

index.html

@@ -4939,7 +4939,7 @@ <h4><dfn>Find Element From Shadow Root</dfn></h4>
   and <var>selector</var>.
 
   <li><p>If <var>result</var> is empty, return <a>error</a>
-  with <a>error code</a> <a>no such shadow root</a>. Otherwise, return the
+  with <a>error code</a> <a>no such element</a>. Otherwise, return the
   first element of <var>result</var>.
 </ol>
 </section> <!-- /Find Element From Shadow Root -->