Add clarification to YAML file (#2857)

[OCP/doc] Update the Ansible Automation Platform CR example ( controller:)

https://issues.redhat.com/browse/AAP-39443

Author: ianf77

downstream/modules/platform/proc-operator-create_crs.adoc

@@ -29,7 +29,7 @@ spec:
   no_log: false
 
   controller:
-    name: existing-controller
+    name: existing-controller #obtain name from controller CR
     disabled: false
 
   eda: