Update changelog for #11802

CHANGELOG.md

@@ -16,6 +16,7 @@ ENHANCEMENTS:
 * `azurerm_healthcare_service` - support for the `public_network_access_enabled` property [GH-11736]
 * `azurerm_hdinsight_kafka_cluster` - support for the `encryption_in_transit_enabled` property [GH-11737]
 * `azurerm_media_services_account` - support for the `key_delivery_access_control` block [GH-11726]
+* `azurerm_monitor_activity_log_alert` - support for `Security` event type for Azure Service Health alerts [GH-11802]
 * `azurerm_netapp_volume` - support for the `security_style` property - [GH-11684]
 * `azurerm_redis_cache` - suppot for the `replicas_per_master` peoperty [GH-11714]
 * `azurerm_spring_cloud_service` - support for the `required_network_traffic_rules` block [GH-11633]