docs: fix broken links

Change-Id: I2720ce4fe30b1e6ff35b91f48a98ead8999ed1ab
diff --git a/docs/html/sdk/android-2.2.jd b/docs/html/sdk/android-2.2.jd
index cfcb7a7..5844256 100644
--- a/docs/html/sdk/android-2.2.jd
+++ b/docs/html/sdk/android-2.2.jd
@@ -351,7 +351,7 @@
 A simple implementation of a BackupAgent useful for backing up preferences 
 and files is available by using {@link android.app.backup.BackupAgentHelper}.
 For more information, see <a
-href="{@docRoot}guide/topics/topics/data/data-backup.html">Data Backup</a>.</p>
+href="{@docRoot}guide/topics/topics/data/backup.html">Data Backup</a>.</p>
 
 <h4>Graphics</h4>