Mention the new example in index.html

git-svn-id: https://flot.googlecode.com/svn/trunk@169 1e0a6537-2640-0410-bfb7-f154510ff394

examples/index.html

@@ -17,6 +17,7 @@
       <li><a href="basic.html">Basic example</a></li>
       <li><a href="graph-types.html">Different graph types</a></li>
       <li><a href="setting-options.html">Setting various options</a></li>
+      <li><a href="annotating.html">Annotating a chart</a></li>
     </ul>
 
     <p>Being interactive:</p>