docs: supportlib icon fix

Change-Id: I423271109e479a8bacc8edb44801dcb5c05ef634
diff --git a/docs/html/tools/support-library/index.jd b/docs/html/tools/support-library/index.jd
index cc023ba..5688d8a 100644
--- a/docs/html/tools/support-library/index.jd
+++ b/docs/html/tools/support-library/index.jd
@@ -59,9 +59,9 @@
 <p>This section provides details about the Support Library package releases.</p>
 
 
-<div class="toggle-content open">
+<div class="toggle-content opened">
   <p id="rev21"><a href="#" onclick="return toggleContent(this)">
-    <img src="{@docRoot}assets/images/triangle-open.png" class="toggle-content-img" alt=""
+    <img src="{@docRoot}assets/images/triangle-opened.png" class="toggle-content-img" alt=""
 />Android Support Library, revision 22.2.0</a> <em>(May 2015)</em>
   </p>
   <div class="toggle-content-toggleme">