Add configmap options resource address (#14851)

Signed-off-by: Aisuko <urakiny@gmail.com>

stable/nginx-ingress/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: nginx-ingress
-version: 1.6.17
+version: 1.6.18
 appVersion: 0.24.1
 home: https://github.com/kubernetes/ingress-nginx
 description: An nginx Ingress controller that uses ConfigMap to store the nginx configuration.

stable/nginx-ingress/values.yaml

@@ -14,7 +14,7 @@ controller:
   containerPort:
     http: 80
     https: 443
-
+  # Will add custom configuration options to Nginx https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/configmap/
   config: {}
   # Will add custom header to Nginx https://github.com/kubernetes/ingress-nginx/tree/master/docs/examples/customization/custom-headers
   headers: {}