ceph: update discussion list address in MAINTAINERS

Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/MAINTAINERS b/MAINTAINERS
index 449d444..c3b60c0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1443,7 +1443,7 @@
 
 CEPH DISTRIBUTED FILE SYSTEM CLIENT
 M:	Sage Weil <sage@newdream.net>
-L:	ceph-devel@lists.sourceforge.net
+L:	ceph-devel@vger.kernel.org
 W:	http://ceph.newdream.net/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
 S:	Supported