Fix variable naming in "focus another option"

Author: josepharhar

source

@@ -54340,7 +54340,7 @@ interface <dfn interface>HTMLSelectElement</dfn> : <span>HTMLElement</span> {
   <ol>
    <li><p>If <var>event</var>'s <span>canceled flag</span> is set, then return.</p></li>
 
-   <li><p>Run the <span>focusing steps</span> on <var>newOption</var>.</p></li>
+   <li><p>Run the <span>focusing steps</span> on <var>option</var>.</p></li>
   </ol>
 
   <p class="note">Implementations commonly allow the user to focus the next or previous option via