Address feedback

Author: detiber

docs/proposals/20191017-control-plane.md

@@ -340,7 +340,7 @@ And the following defaulting:
   - Status.ControlPlaneReady is set based on the value of Status.Ready for the referenced resource, this field is intended to eventually replace Status.ControlPlaneInitialized as a field that will be kept up to date instead of set only once.
 - Current behavior will be preserved if `Cluster.Spec.ControlPlaneRef` is not set.
 - CA certificate secrets that were previously generated by the Kubeadm bootstrapper will now be generated by the KubeadmControlPlane Controller, maintaining backwards compatibility with the previous behavior if the KubeadmControlPlane is not used.
-- The kubeconfig secret that was previously created by the Machine Controller will now be generated by the KubeadmControlPlane Controller, maintaining backwards compatibility with the previous behavior if the KubeadmControlPlane is not used.
+- The kubeconfig secret that was previously created by the Cluster Controller will now be generated by the KubeadmControlPlane Controller, maintaining backwards compatibility with the previous behavior if the KubeadmControlPlane is not used.
 
 #### Behaviors