QMP/README: Update QMP homepage address

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
(cherry picked from commit a18b2ce2ed9dc747c2ebab5a220517624e4ff3df)
diff --git a/QMP/README b/QMP/README
index 948d445..d1430b0 100644
--- a/QMP/README
+++ b/QMP/README
@@ -88,4 +88,4 @@
 Homepage
 --------
 
-http://www.linux-kvm.org/page/MonitorProtocol
+http://wiki.qemu.org/QMP