Commit e2ae6159de "virtio-serial: report frontend connection state via
monitor" neglected to document the new event is rate-limited.  Fix
that.

Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200806081147.3123652-3-armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 qapi/char.json | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/qapi/char.json b/qapi/char.json
index 8aeedf96b2..b4d66ec90b 100644
--- a/qapi/char.json
+++ b/qapi/char.json
@@ -562,6 +562,8 @@
 #
 # @open: true if the guest has opened the virtio-serial port
 #
+# Note: This event is rate-limited.
+#
 # Since: 2.1
 #
 # Example:
-- 
2.26.2