[occm] add notes to indicated that health monitors for ovn require Wallaby or later

Author: ProbstDJakob

docs/openstack-cloud-controller-manager/expose-applications-using-loadbalancer-type-service.md

@@ -180,6 +180,8 @@ Request Body:
 
   Defines whether to create health monitor for the load balancer pool, if not specified, use `create-monitor` config. The health monitor can be created or deleted dynamically. A health monitor is required for services with `externalTrafficPolicy: Local`.
 
+  NOTE: Health monitors for the `ovn` provider are only supported on OpenStack Wallaby and later.
+
 - `loadbalancer.openstack.org/health-monitor-delay`
 
   Defines the health monitor delay in seconds for the loadbalancer pools.

docs/openstack-cloud-controller-manager/using-openstack-cloud-controller-manager.md

@@ -231,6 +231,8 @@ Although the openstack-cloud-controller-manager was initially implemented with N
 * `create-monitor`
   Indicates whether or not to create a health monitor for the service load balancer. A health monitor required for services that declare `externalTrafficPolicy: Local`. Default: false
 
+  NOTE: Health monitors for the `ovn` provider are only supported on OpenStack Wallaby and later.
+
 * `monitor-delay`
   The time, in seconds, between sending probes to members of the load balancer. Default: 5