correct the nuances of the note, I misremembered / misread my own previous comments

- using the configurable add-on is not necessary per se, can remove
  `--kubelet-insecure-tls` from _any_ installation of `metrics-server`,
  including one via its Helm chart

Author: agilgur5

docs/releases/1.19-NOTES.md

@@ -72,7 +72,7 @@ has been updated by a newer version of kOps unless it is given the `--allow-kops
 ### Addons
 
 * Metrics Server is now available as a configurable addon. Add `spec.metricsServer.enabled: true` to the cluster spec to enable.
-  * This new addon is **more secure** than installing directly via the `metrics-server` Helm chart as kOps automatically provisions and sets TLS certs, avoiding the need to use the `--kubelet-insecure-tls` flag. See [#6879](https://github.com/kubernetes/kops/issues/6879) for more details.
+  * With this change, one no longer has to set the `--kubelet-insecure-tls` flag, making any `metrics-server` installation **more secure**. See [#6879](https://github.com/kubernetes/kops/issues/6879) for more details.
 
 * Cluster Autoscaler is now availalble as a configurable addon. Add `spec.clusterAutoscaler.enabled: true` to the cluster spec to enable.