SEC-312: wrong chapter number in Chinese book.

doc/xdocs/articles.html

@@ -115,7 +115,7 @@
 		Matt Raible is including Acegi Security in Chapter 12 of his popular ebook.<br><br>
 	</li>
     <li><b><a href="http://www.china-pub.com/computers/common/info.asp?id=24483">Mastering Spring (Chinese) Book</a></b>:
-		Acegi Security is included in Chapter 6 of this book.<br><br>
+		Acegi Security is included in Chapter 17 of this book.<br><br>
 	</li>
     <li><b><a href="http://www.manning.com/walls2">Spring In Action</a></b>:
 		Craig Walls has also written another popular Spring book, which includes Acegi Security in Chapter 11.<br><br>