Merge pull request aws-samples#421 from szuecs/fix/kube-ingress-aws-controller

fix aws policy to make sure the current version is working

Author: Christopher Hein

04-path-security-and-networking/405-ingress-controllers/readme.adoc

@@ -301,6 +301,7 @@ kube-aws-ingress-controller, which we will use:
     "autoscaling:DetachLoadBalancers",
     "autoscaling:DetachLoadBalancerTargetGroups",
     "autoscaling:AttachLoadBalancerTargetGroups",
+    "autoscaling:DescribeLoadBalancerTargetGroups",
     "cloudformation:*",
     "elasticloadbalancing:*",
     "elasticloadbalancingv2:*",
@@ -338,6 +339,7 @@ and add this to your node policy:
             "autoscaling:DetachLoadBalancers",
             "autoscaling:DetachLoadBalancerTargetGroups",
             "autoscaling:AttachLoadBalancerTargetGroups",
+            "autoscaling:DescribeLoadBalancerTargetGroups",
             "cloudformation:*",
             "elasticloadbalancing:*",
             "elasticloadbalancingv2:*",