fix docs

Author: maltesander

docs/modules/spark-k8s/pages/usage-guide/listenerclass.adoc

@@ -4,7 +4,7 @@
 == HSpark History services
 
 The operator deploys a xref:listener-operator:listener.adoc[Listener] for each Spark History Server pod.
-The default is to only being accessible from within the Kubernetes cluster, but this can be changed by setting `.spec.nodes.config.listenerClass`:
+The default is to only being accessible from within the Kubernetes cluster, but this can be changed by setting `.spec.nodes.roleConfig.listenerClass`:
 
 [source,yaml]
 ----
@@ -19,7 +19,7 @@ spec:
 ----
 <1> Specify one of `external-stable`, `external-unstable`, `cluster-internal` (the default setting is `cluster-internal`).
 
-For the example above, the listener operator creates a service named `spark-history-node-default` where `spark-history` is the name of the SparkHistoryServer, `node` is the service role (the only service role available for history servers) and `default` is the role group.
+For the example above, the listener operator creates a service named `spark-history-node` where `spark-history` is the name of the SparkHistoryServer and `node` is the service role (the only service role available for history servers).
 
 == Spark Connect services
 
@@ -35,4 +35,7 @@ spec:
   servers:
     roleConfig:
       listenerClass: external-unstable  # <1>
-----
+----
+<1> Specify one of `external-stable`, `external-unstable`, `cluster-internal` (the default setting is `cluster-internal`).
+
+For the example above, the listener operator creates a service named `spark-connect-server` where `spark-connect` is the name of the SparkConnectServer and `server` is the service role.