message: docs: minor deprecation note
diff: @@ -38,7 +38,9 @@ Version 1.12.0 (pending)
  <envoy_api_msg_config.filter.network.http_connection_manager.v2.HttpConnectionManager>`
  has been deprecated in favor of the `traffic_direction` field in
  :ref:`Listener <envoy_api_msg_Listener>`. The latter takes priority if
  - specified.
  + specified. Note that the default value `INGRESS` of the `operation_name`
  + field is not detected as being set, so the deprecation warning is not
  + triggered for it.
  Version 1.11.0 (July 11, 2019)
  ==============================
  