Update DataprocCreateCluster operator to use 'label' parameter proper…

…ly (#30741)

airflow/providers/google/cloud/operators/dataproc.py

@@ -110,7 +110,6 @@ class ClusterGenerator:
         ``pd-standard`` (Persistent Disk Hard Disk Drive).
     :param worker_disk_size: Disk size for the worker nodes
     :param num_preemptible_workers: The # of preemptible worker nodes to spin up
-    :param labels: dict of labels to add to the cluster
     :param zone: The zone where the cluster will be located. Set to None to auto-zone. (templated)
     :param network_uri: The network uri to be used for machine communication, cannot be
         specified with subnetwork_uri
@@ -412,10 +411,13 @@ class DataprocCreateClusterOperator(GoogleCloudBaseOperator):
         For more information on how to use this operator, take a look at the guide:
         :ref:`howto/operator:DataprocCreateClusterOperator`
 
-    :param project_id: The ID of the google cloud project in which
+    :param project_id: The ID of the Google cloud project in which
         to create the cluster. (templated)
     :param cluster_name: Name of the cluster to create
-    :param labels: Labels that will be assigned to created cluster
+    :param labels: Labels that will be assigned to created cluster. Please, notice that
+        adding labels to ClusterConfig object in cluster_config parameter will not lead
+        to adding labels to the cluster. Labels for the clusters could be only set by passing
+        values to parameter of DataprocCreateCluster operator.
     :param cluster_config: Required. The cluster config to create.
         If a dict is provided, it must be of the same form as the protobuf message
         :class:`~google.cloud.dataproc_v1.types.ClusterConfig`