Fix incorrect delegate_to in control plane upgrade

playbooks/common/openshift-cluster/upgrades/upgrade_control_plane.yml

@@ -157,7 +157,7 @@
     - l_pb_upgrade_control_plane_post_upgrade_storage.rc != 0
     - openshift_upgrade_post_storage_migration_fatal | default(false,true) | bool
     run_once: true
-    delegate_to: oo_first_master
+    delegate_to: "{{ groups.oo_first_master.0 }}"
 
   - set_fact:
       master_update_complete: True