fix the index page

Change-Id: I84461a7ace1c6bde8e99534096cc9e485cecb4c4
diff --git a/docs/html/auto/index.jd b/docs/html/auto/index.jd
index 2a527b3..63772e2 100644
--- a/docs/html/auto/index.jd
+++ b/docs/html/auto/index.jd
@@ -2,6 +2,7 @@
 page.viewport_width=970
 fullpage=true
 no_footer_links=true
+page.type=about
 
 @jd:body