Docs: Fixing table of contents headers

Bug: 18035126
Change-Id: I41be3417c69fb4b4a8355f8327da418560526704
diff --git a/src/devices/tech/security/index.jd b/src/devices/tech/security/index.jd
index b8b7dd8..783eef1 100644
--- a/src/devices/tech/security/index.jd
+++ b/src/devices/tech/security/index.jd
@@ -17,11 +17,11 @@
 -->
 <div id="qv-wrapper">
   <div id="qv">
-    <h3>In this document</h3>
-    <ol id="auto-toc">
-    </ol>
+    <h2>In this document</h2>
+    <ol id="auto-toc"></ol>
   </div>
 </div>
+
 <h2 id="introduction">Introduction</h2>
 <p>Android is a modern mobile platform that was designed to be truly open. Android
   applications make use of advanced hardware and software, as well as local and