Update the directory content title for 404 page

Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>

download.eclipse.org/404.php

diff --git a/download.eclipse.org/404.php b/download.eclipse.org/404.php
index d7581f9..0cf3cc2 100644
--- a/download.eclipse.org/404.php
+++ b/download.eclipse.org/404.php
@@ -49,7 +49,7 @@
       $files = array();
       $dirs = array();
       if ($dh = opendir($dir)) {
-        $dir_html = "<p><strong>Directory Contents</strong></p><div id='dirlist'>";
+        $dir_html = "<h2>Directory Contents</h2><div id='dirlist'>";
         while (($file = readdir($dh)) !== false) {
           if (filetype($dir . $file) == "dir") {
             $dirs[] = $file;