docs: Add notes for Kubernetes 1.16 (#873)

BREAKING CHANGES: The default `cluster_version` is now 1.16. Kubernetes 1.16 includes a number of deprecated API removals, and you need to ensure your applications and add ons are updated, or workloads could fail after the upgrade is complete. For more information on the API removals, see the [Kubernetes blog post](https://kubernetes.io/blog/2019/07/18/api-deprecations-in-1-16/). For action you may need to take before upgrading, see the steps in the [EKS documentation](https://docs.aws.amazon.com/eks/latest/userguide/update-cluster.html). Please set explicitly your `cluster_version` to an older EKS version until your workloads are ready for Kubernetes 1.16.

.chglog/CHANGELOG.tpl.md

@@ -24,6 +24,15 @@ project adheres to [Semantic Versioning](http://semver.org/).
 {{ end -}}
 {{ end }}
 {{ end -}}
+
+{{- if .Unreleased.NoteGroups -}}
+{{ range .Unreleased.NoteGroups -}}
+{{ .Title }}:
+{{ range .Notes -}}
+- {{ .Body }}
+{{ end }}
+{{ end -}}
+{{ end -}}
 {{ end -}}
 
 {{ range .Versions }}
@@ -49,8 +58,8 @@ project adheres to [Semantic Versioning](http://semver.org/).
 {{- if .NoteGroups -}}
 {{ range .NoteGroups -}}
 {{ .Title }}:
-{{ range .Notes }}
-{{ .Body }}
+{{ range .Notes -}}
+- {{ .Body }}
 {{ end }}
 {{ end -}}
 {{ end -}}

.chglog/config.yml

@@ -36,7 +36,7 @@ options:
 
   notes:
     keywords:
-      - BREAKING CHANGE
+      - BREAKING CHANGES
       - NOTES
 
   refs: