fix spelling in QMP sub directory

Cc: Markus Armbruster <armbru@redhat.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/QMP/qmp-events.txt b/QMP/qmp-events.txt
index 0ce5d4e..af586ec 100644
--- a/QMP/qmp-events.txt
+++ b/QMP/qmp-events.txt
@@ -126,7 +126,7 @@
 VNC_DISCONNECTED
 ----------------
 
-Emitted when the conection is closed.
+Emitted when the connection is closed.
 
 Data: