message: clarify caData field
  The code in `@kubernetes/client-node` will decode this value, as seen here:
  I have seen a casual reader insert the multi-line raw contents of a PEM file in
  this field, so it seems worth mentioning the extra layer of encoding explicitly.
diff: @@ -236,10 +236,12 @@ kubernetes:
  ##### `clusters.\*.caData` (optional)
  -PEM-encoded certificate authority certificates.
  +Base64-encoded certificate authority bundle in PEM format. The Kubernetes client
  +will verify that TLS certificate presented by the API server is signed by this
  +CA.
  -This values could be obtained via inspecting the Kubernetes config file (usually
  -at `~/.kube/config`) under `clusters.cluster.certificate-authority-data`. For
  +This value could be obtained via inspecting the kubeconfig file (usually
  +at `~/.kube/config`) under `clusters[*].cluster.certificate-authority-data`. For
  GKE, execute the following command to obtain the value
  ```
  