docs: update helm install command (kubernetes-sigs#1793)

* docs: update helm install command

* docs: suggest a namespace

* docs: specify a name

Author: 0xPoe

docs/deploy/installation.md

@@ -67,7 +67,7 @@ curl -o iam-policy.json https://raw.githubusercontent.com/kubernetes-sigs/aws-lo
     ```
     1. Install the helm chart
     ```
-    helm install eks/aws-load-balancer-controller
+    helm install aws-load-balancer-controller eks/aws-load-balancer-controller -n kube-system --set clusterName=<cluster-name>
     ```