[stable/kafka-manager] add repo archive notice (#24135)

Signed-off-by: Scott Rigby <scott@r6by.com>

stable/kafka-manager/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: kafka-manager
-version: 2.3.3
+version: 2.3.4
 appVersion: 1.3.3.22
 kubeVersion: "^1.8.0-0"
 description: A tool for managing Apache Kafka.

stable/kafka-manager/README.md

@@ -1,3 +1,8 @@
+# ⚠️ Repo Archive Notice
+
+As of Nov 13, 2020, charts in this repo will no longer be updated.
+For more information, see the Helm Charts [Deprecation and Archive Notice](https://github.com/helm/charts#%EF%B8%8F-deprecation-and-archive-notice), and [Update](https://helm.sh/blog/charts-repo-deprecation/).
+
 # Kafka Manager Helm Chart
 
 [Kafka Manager](https://github.com/yahoo/kafka-manager) is a tool for managing [Apache Kafka](http://kafka.apache.org/).