message: docs: fix lds docs
diff: @@ -26,12 +26,12 @@ The semantics of listener updates are as follows:
  .. code-block:: json
  {
  - "cluster": "{...}",
  + "cluster": "...",
  "refresh_delay_ms": "..."
  }
  cluster
  - *(required, object)* The name of an upstream :ref:`cluster <config_cluster_manager_cluster>` that
  + *(required, string)* The name of an upstream :ref:`cluster <config_cluster_manager_cluster>` that
  hosts the listener discovery service. The cluster must run a REST service that implements the
  :ref:`LDS HTTP API <config_listeners_lds_api>`. NOTE: This is the *name* of a cluster defined
  in the :ref:`cluster manager <config_cluster_manager>` configuration, not the full definition of
  