Restore hightlighting to show notes preformatted text

This was lost in the transition to the new website design.

templates/content-episode.tpl.html

@@ -26,7 +26,7 @@ Hosted by <a href="<!--% absolute_path(baseurl) %-->correspondents/<!--% zero_pa
 <h3><!--% show_series(episode.series, episode.seriesid, "Part of the series") %--></h3> 
 <p><em><!--% episode.series_description %--></em></p>
 	</header>
-	<div><!--% episode.notes %--></div>
+	<div id="show_notes"><!--% episode.notes %--></div>
 <footer>
 <p>
 <!--% episode_navigation %-->