Merge pull request #55485 from jeana-redhat/OCPBUGS-4561-followup

[OCPBUGS-4561]: Small update to revised instance type proc

Author: jeana-redhat

modules/aws-console-changing-aws-instance-type.adoc

@@ -11,6 +11,7 @@ You can change the Amazon Web Services (AWS) instance type that your control pla
 .Prerequisites
 
 * You have access to the AWS console with the permissions required to modify the EC2 Instance for your cluster.
+* You have access to the {product-title} cluster as a user with the `cluster-admin` role.
 
 .Procedure
 
@@ -28,4 +29,6 @@ You can change the Amazon Web Services (AWS) instance type that your control pla
 
 .. Start the instance.
 
+.. If your {product-title} cluster has a corresponding `Machine` object for the instance, update the instance type of the object to match the instance type set in the AWS console.
+
 . Repeat this process for each control plane machine.