Update readme to reference the aws-account-setup private repo

README.md

@@ -1,6 +1,8 @@
 # giantswarm-aws-account-prerequisites
 
-This repo contains OpenTofu / Terraform configuration to prepare AWS accounts for running Giant Swarm clusters based on Cluster API Provider for AWS (CAPA).
+This repository contains OpenTofu / Terraform configuration to prepare AWS accounts for running Giant Swarm clusters based on Cluster API Provider for AWS (CAPA).
+
+Note that this repo is intended for Giant Swarm customers to setup the initial admin role and to provide some transparency on the different IAM policies that will be used by CAPA and other components. But it's not to be used by Giant Swarm staff to manage AWS IAM resources directly, head to <https://github.com/giantswarm/aws-account-setup/> for that.
 
 ## Before starting