helm: add info comments to the chart values

Signed-off-by: Bryan Jones <unix.chkpwd@gmail.com>

deploy/charts/rook-ceph-cluster/values.yaml

@@ -417,6 +417,8 @@ ingress:
   # -- Enable an ingress for the ceph-dashboard
   dashboard:
     {}
+    # labels:
+    #   external-dns/private: "true"
     # annotations:
     #   external-dns.alpha.kubernetes.io/hostname: dashboard.example.com
     #   nginx.ingress.kubernetes.io/rewrite-target: /ceph-dashboard/$2