[kong] release 1.9.1

Release version 1.9.1. This version clarifies upgrade documentation for
1.9.0, and does not include functional changes of its own.

charts/kong/CHANGELOG.md

@@ -1,12 +1,27 @@
 # Changelog
 
+## 1.9.1
+
+### Documentation
+
+* Clarified documentation for [breaking changes in 1.9.0](#190) to indicate
+  that any values.yaml that sets `waitImage.repository` requires changes,
+  including those that set the old default.
+* Updated Enterprise examples to use latest Enterprise image version.
+
 ## 1.9.0
 
 ### Breaking changes
 
-Changes to the pre-migration database check require [performing an initial chart version upgrade with migrations disabled](https://github.com/Kong/charts/blob/next/charts/kong/UPGRADE.md#changes-to-wait-for-postgres-image).
+1.9.0 now uses a bash-based pre-migration database availability check. If you
+set `waitImage.repository` in values.yaml, either to the previous default
+(`busybox`) or to a custom image, you must change it to an image that includes
+a `bash` executable.
 
-If you use a custom image for this check, you will need to change it to an image that provides a `bash` executable.
+Once you have `waitImage.repository` set to an image with bash, [perform an
+initial chart version upgrade with migrations disabled](https://github.com/Kong/charts/blob/main/charts/kong/UPGRADE.md#changes-to-wait-for-postgres-image)
+before re-enabling migrations, updating your Kong image version, and performing
+a second release upgrade.
 
 ### Improvements
 

charts/kong/Chart.yaml

@@ -10,5 +10,5 @@ maintainers:
   email: [email protected]
 name: kong
 sources:
-version: 1.9.0
+version: 1.9.1
 appVersion: 2.0

charts/kong/UPGRADE.md

@@ -76,8 +76,10 @@ netcat](https://github.com/Kong/charts/blob/kong-1.8.0/charts/kong/templates/_he
 
 As of 1.9.0, the chart uses a [bash
 script](https://github.com/Kong/charts/blob/kong-1.9.0/charts/kong/templates/wait-for-postgres-script.yaml)
-to perform the same connectivity check. The default `waitImage.repository` value
-is now `bash` rather than `busybox`.
+to perform the same connectivity check. The default `waitImage.repository`
+value is now `bash` rather than `busybox`. Double-check your values.yaml to
+confirm that you do not set `waitImage.repository` and `waitImage.tag` to the
+old defaults: if you do, remove that configuration before upgrading.
 
 The Helm upgrade cycle requires this script be available for upgrade jobs. On
 existing installations, you must first perform an initial `helm upgrade --set