Update pager demos to match new v4 ViewPager API.

Change-Id: I3b0f3382d56b477868b5a5fbf5af22fa83c3e06a
diff --git a/samples/Support13Demos/_index.html b/samples/Support13Demos/_index.html
index d6168ab..5861f72 100644
--- a/samples/Support13Demos/_index.html
+++ b/samples/Support13Demos/_index.html
@@ -19,7 +19,7 @@
 "together. Current samples are only for the fragment and loader in the "+
 "application part of the support library:</p>"+
 
-"<ul><li><a href='src/com/example/android/supportv4/app/index.html'>App</a></li></ul>");
+"<ul><li><a href='src/com/example/android/supportv13/app/index.html'>App</a></li></ul>");
 
 }