Update link to wiki.

asio/src/doc/using.qbk

diff --git a/asio/src/doc/using.qbk b/asio/src/doc/using.qbk
index 1f16f10..c536929 100644
--- a/asio/src/doc/using.qbk
+++ b/asio/src/doc/using.qbk
@@ -310,6 +310,6 @@
 [heading Wiki]
 
 Users are encouraged to share examples, tips and FAQs on the Asio wiki,
-which is located at [@http://asio.sourceforge.net].
+which is located at [@http://think-async.com/Asio/].
 
 [endsect]