edit prerequisites on setting up test environments

Author: paigecalvert

docs/vendor/replicated-onboarding.mdx

@@ -41,19 +41,19 @@ To search and participate in the Replicated community, see https://community.rep
 
 * Set up a VM. You will use this VM to test installing and updating with the Replicated Embedded Cluster installer throughout the main onboarding tasks.
 
-   :::note
-   You do not need access to a Kubernetes cluster for the main onboarding tasks, unless you intend to support existing cluster installations with Replicated KOTS. For information about how to create a cluster, see [Create a Kubernetes Cluster](/vendor/environment-setup#create-a-kubernetes-cluster) in _Set Up Your Environment_.
-   :::
+    The VM that you create must meet the following requirements for Embedded Cluster:
 
-   The VM that you create must meet the following requirements for Embedded Cluster:
+    <Requirements/>
 
-   <Requirements/>
+* (Optional) Create a Kubernetes cluster for testing Helm installations and/or existing cluster installations with Replicated KOTS. For information about how to create a cluster, see [Create a Kubernetes Cluster](/vendor/environment-setup#create-a-kubernetes-cluster) in _Set Up Your Environment_.
+
+    If you do _not_ intend to support existing cluster KOTS installations, you can wait to create this cluster until you begin the [Next Steps > Add Support for Helm Installations](/vendor/replicated-onboarding#add-support-for-helm-installations) task.
 
 * Complete a basic quick start workflow to create an application with a sample Helm chart and then promote and install releases in a development environment. This helps you get familiar with the process of creating, installing, and updating releases in the Replicated Platform. See [Replicated Quick Start](/vendor/quick-start).
 
 ## Onboard
 
-Complete the tasks in this section to onboard your application. When you are done, you can continue to [Next Steps](#next-steps) to integrate other Replicated features with your application.
+Complete the tasks in this section to onboard your application to the Replicated Platform, with support for . When you are done, you can continue to [Next Steps](#next-steps) to integrate other Replicated features with your application.
 
 ### Task 1: Create An Application