Update configurations.md

We received feedback about this page, expressing the need to clarify the controller configuration options content and to direct users to the actual supported Helm chart options.

Author: tucktuck9

docs/deploy/configurations.md

@@ -1,5 +1,5 @@
 # Controller configuration options
-This document covers configuration of the AWS Load Balancer controller
+This document primarily covers the runtime configuration options for the AWS Load Balancer Controller. For installation-specific configuration options, see the [Helm chart values documentation](https://github.com/aws/eks-charts/tree/master/stable/aws-load-balancer-controller#configuration).
 
 !!!warning "limitation"
     The v2.0.0+ version of AWSLoadBalancerController currently only support one controller deployment(with one or multiple replicas) per cluster.
@@ -182,4 +182,4 @@ There are a set of key=value pairs that describe AWS load balancer controller fe
 | NLBHealthCheckAdvancedConfiguration   | string                          | true          | Enable or disable advanced health check configuration for NLB, for example health check timeout                                                                                      |
 | ALBSingleSubnet                       | string                          | false         | If enabled, controller will allow using only 1 subnet for provisioning ALB, which need to get whitelisted by ELB in advance                                                          |
 | NLBSecurityGroup                      | string                          | true          | Enable or disable all NLB security groups actions including frontend sg creation, backend sg creation, and backend sg modifications                                                  |
-| LBCapacityReservation                 | string                          | true          | Enable or disable the capacity reservation feature on ALB and NLB
+| LBCapacityReservation                 | string                          | true          | Enable or disable the capacity reservation feature on ALB and NLB