Update User guide link for wordpress demo

app/config/wp-demo/civicrm-wordpress.xml

@@ -69,7 +69,7 @@ Go to <a href="http://civicrm-wordpress.ex/wp-login.php">WordPress Administrati
 <strong>Any data you enter on this demo site is "publicly available" due to the open login. Please do not enter real email addresses or other personal information.</strong> The demo database is reset periodically.
 <h3>New to CiviCRM?</h3>
 <ul>
-	<li>Learn about how you can use CiviCRM from our new <strong><a title="Opens Understanding CiviCRM book in a new window" href="http://book.civicrm.org" target="_blank">online book</a></strong>.</li>
+	<li>Learn about how you can use CiviCRM from our new <strong><a title="Opens Understanding CiviCRM book in a new window" href="https://docs.civicrm.org/user/en/stable/" target="_blank">online book</a></strong>.</li>
 	<li>Check out <strong><a href="http://civicrm.org/">CiviCRM.org</a></strong> for an overview of the project, blogs, professional services listings and other resources and links.</li>
 	<li>Browse the <strong><a href="http://forum.civicrm.org/">Community Forum</a></strong> to see what folks in the CiviCRM community are talking about.</li>
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