updated vault helm chart doc with usecase of nlb

Signed-off-by: Kumar, Rajesh (XINBM1A) <[email protected]>

website/content/docs/platform/k8s/helm/index.mdx

@@ -59,6 +59,8 @@ cluster](https://kubernetes.io/docs/tasks/administer-cluster/securing-a-cluster/
 options](/vault/docs/platform/k8s/helm/configuration), and read the [production deployment
 checklist](/vault/docs/platform/k8s/helm/run#architecture).
 
+-> **Important:** This helm chart always provisions Application Load Balancer(ALB) at the AWS side, if you have the requirements of running vault with Network Load Balancer(NLB) then you need to provision NLB in front of your ALB. This special kind of requirement can arise where you need to use AWS PrivateLink with your vault and PrivateLink only works with NLB.
+
 ## Tutorial
 
 Refer to the [Kubernetes](/vault/tutorials/kubernetes)