GH#45149: Update cluster-api-delete-machine

Author: mburke5678

modules/machineset-delete-policy.adoc

@@ -15,7 +15,7 @@ spec:
   replicas: <desired_replica_count>
 ----
 
-Specific machines can also be prioritized for deletion by adding the annotation `machine.openshift.io/cluster-api-delete-machine` to the machine of interest, regardless of the deletion policy.
+Specific machines can also be prioritized for deletion by adding the annotation `machine.openshift.io/cluster-api-delete-machine=true` to the machine of interest, regardless of the deletion policy.
 
 [IMPORTANT]
 ====