[stable/mailhog] Deprecate chart after moving to new repo (#13315)

Signed-off-by: Reinhard Nägele <unguiculus@gmail.com>

stable/mailhog/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v1
-description: An e-mail testing tool for developers
+description: DEPRECATED - An e-mail testing tool for developers
 name: mailhog
 appVersion: 1.0.0
-version: 2.3.0
+version: 2.3.1
 keywords:
   - mailhog
   - mail
@@ -14,6 +14,5 @@ home: http://iankent.uk/project/mailhog/
 icon: https://raw.githubusercontent.com/mailhog/MailHog-UI/master/assets/images/hog.png
 sources:
   - https://github.com/mailhog/MailHog
-maintainers:
-  - name: unguiculus
-    email: unguiculus@gmail.com
+# Chart moved to https://github.com/codecentric/helm-charts
+deprecated: true

stable/mailhog/README.md

@@ -1,5 +1,15 @@
-# Mailhog
+# DEPRECATED - Mailhog
 
+**This chart has been deprecated and moved to its new home:**
+
+- **GitHub repo:** https://github.com/codecentric/helm-charts
+- **Charts repo:** https://codecentric.github.io/helm-charts
+
+```bash
+helm repo add codecentric https://codecentric.github.io/helm-charts
+```
+
+---
 [Mailhog](http://iankent.uk/project/mailhog/) is an e-mail testing tool for developers.
 
 ## TL;DR;

stable/mailhog/templates/NOTES.txt

@@ -1,3 +1,11 @@
+**********************************************************************
+This chart has been DEPRECATED and moved to its new home:
+
+* GitHub repo: https://github.com/codecentric/helm-charts
+* Charts repo: https://codecentric.github.io/helm-charts
+
+**********************************************************************
+
 Mailhog can be accessed via ports {{ .Values.service.port.http }} (HTTP) and {{ .Values.service.port.smtp }} (SMTP) on the following DNS name from within your cluster:
 {{ template "mailhog.fullname" . }}.{{ .Release.Namespace }}.svc.cluster.local