[stable/karma] deprecating chart (#24341)

Signed-off-by: Matt Farina <matt@mattfarina.com>

stable/karma/Chart.yaml

@@ -1,14 +1,10 @@
 apiVersion: v1
 appVersion: "v0.72"
-description: A Helm chart for Karma - an UI for Prometheus Alertmanager
+description: DEPRECATED - A Helm chart for Karma - an UI for Prometheus Alertmanager
 name: karma
 home: https://github.com/prymitive/karma
 sources:
   - https://hub.docker.com/r/lmierzwa/karma/
   - https://github.com/prymitive/karma
-version: 1.7.1
-maintainers:
-- name: davidkarlsen
-  email: david@davidkarlsen.com
-- name: prymitive
-  email: l.mierzwa@gmail.com
+version: 1.7.2
+deprecated: true

stable/karma/OWNERS

@@ -1,6 +0,0 @@
-approvers:
-- davidkarlsen
-- prymitive
-reviewers:
-- davidkarlsen
-- prymitive

stable/karma/README.md

@@ -7,6 +7,10 @@ For more information, see the Helm Charts [Deprecation and Archive Notice](https
 
 Karma is an ASL2 licensed alert dashboard for Prometheus Alertmanager.
 
+## DEPRECATION NOTICE
+
+This chart is deprecated and no longer supported.
+
 ## Introduction
 
 This chart deploys karma to your cluster via a Deployment and Service.