GH38678: Adding info on playbook to preparing for playbook topic

Author: mburke5678

modules/rhel-preparing-playbook-machine.adoc

@@ -6,7 +6,7 @@
 [id="rhel-preparing-playbook-machine_{context}"]
 = Preparing the machine to run the playbook
 
-Before you can add compute machines that use {op-system-base-full} as the operating system to an {product-title} {product-version} cluster, you must prepare a {op-system-base} 7 machine to run the playbook from. This machine is not part of the cluster but must be able to access it.
+Before you can add compute machines that use {op-system-base-full} as the operating system to an {product-title} {product-version} cluster, you must prepare a {op-system-base} 7 machine to run an Ansible playbook that adds the new node to the cluster. This machine is not part of the cluster but must be able to access it.
 
 .Prerequisites