Deprecate cert-manager chart (#12970)

Signed-off-by: James Munnelly <james@munnelly.eu>

stable/cert-manager/Chart.yaml

@@ -1,5 +1,5 @@
 name: cert-manager
-version: v0.6.6
+version: v0.6.7
 appVersion: v0.6.2
 description: A Helm chart for cert-manager
 home: https://github.com/jetstack/cert-manager
@@ -10,6 +10,11 @@ keywords:
   - tls
 sources:
   - https://github.com/jetstack/cert-manager
-maintainers:
-  - name: munnerz
-    email: james@jetstack.io
+# Deprecated charts cannot have maintainers
+maintainers: []
+  # - name: munnerz
+  #   email: james@jetstack.io
+# This version of the Helm chart is deprecated.
+# All future updates should be instead made to the official cert-manager
+# repository, found at https://github.com/jetstack/cert-manager/tree/master/deploy
+deprecated: true

stable/cert-manager/README.md

@@ -1,5 +1,10 @@
 # cert-manager
 
+> **This Helm chart is deprecated**.
+> All future changes to the cert-manager Helm chart should be made in the
+> [official repository](https://github.com/jetstack/cert-manager/tree/master/deploy).
+> The latest version of the chart can be found on the [Helm Hub](https://hub.helm.sh/charts/jetstack/cert-manager).
+
 cert-manager is a Kubernetes addon to automate the management and issuance of
 TLS certificates from various issuing sources.
 

stable/cert-manager/templates/NOTES.txt

@@ -13,3 +13,8 @@ Certificates for Ingress resources, take a look at the `ingress-shim`
 documentation:
 
 https://cert-manager.readthedocs.io/en/latest/reference/ingress-shim.html
+
+**This Helm chart is deprecated**.
+All future changes to the cert-manager Helm chart should be made in the
+official repository: https://github.com/jetstack/cert-manager/tree/master/deploy.
+The latest version of the chart can be found on the Helm Hub: https://hub.helm.sh/charts/jetstack/cert-manager.