revert: use fail instead of end_play

ansible/opnsense/update_opnsense_ha_cluster.yml

@@ -116,8 +116,8 @@
           run_once: true
           when: ntfy_url is defined
 
-        - name: Skip
+        - ansible.builtin.fail:
-          ansible.builtin.meta: end_play
+            msg: "Update aborted"
 
 
 - name: "Phase 2 | Update backup node (TrueNAS, no snapshot)"