Fix typo s/on_fail/on-fail/g

Author: spetrosi

README.md

@@ -1068,7 +1068,7 @@ For more information, see the `fedora.linux_system_roles.ha_cluster` role docume
           - attrs:
             - name: notify
               value: true
-            - name: on_fail
+            - name: on-fail
               value: demote
     ha_cluster_constraints_colocation:
       - resource_leader:
@@ -1174,7 +1174,7 @@ Note that production environments require Pacemaker configured with fencing agen
           - attrs:
             - name: notify
               value: true
-            - name: on_fail
+            - name: on-fail
               value: demote
     ha_cluster_constraints_colocation:
       - resource_leader:
@@ -1314,7 +1314,7 @@ This example playbooks sets the `firewall` variables for the `fedora.linux_syste
           - attrs:
             - name: notify
               value: true
-            - name: on_fail
+            - name: on-fail
               value: demote
     ha_cluster_constraints_colocation:
       - resource_leader:

tests/tests_configure_ha_cluster_external.yml

@@ -86,7 +86,7 @@
           - attrs:
             - name: notify
               value: true
-            - name: on_fail
+            - name: on-fail
               value: demote
     ha_cluster_constraints_colocation:
       - resource_leader: