update IW Triggers resource docs

website/docs/r/incident_workflow_trigger.html.markdown

@@ -58,9 +58,9 @@ The following arguments are supported:
 * `workflow` - (Required) The workflow ID for the workflow to trigger.
 * `services` - (Optional) A list of service IDs. Incidents in any of the listed services are eligible to fire this trigger.
 * `subscribed_to_all_services` - (Required) Set to `true` if the trigger should be eligible for firing on all services. Only allowed to be `true` if the services list is not defined or empty.
-* `permissions` - (Optional) Replace any CEF field or Custom Details object field using custom variables.
-  * `restricted` - (Optional)
-  * `team_id` - (Optional)
+* `permissions` - (Optional) Indicates who can start this Trigger. Applicable only to `manual`-type triggers.
+  * `restricted` - (Optional) If `true`, indicates that the Trigger can only be started by authorized Users. If `false` (default), any user can start this Trigger. Applicable only to `manual`-type triggers.
+  * `team_id` - (Optional) The ID of the Team whose members can manually start this Trigger. Required and allowed only if `restricted` is `true`.
 * `condition` - (Required for `conditional`-type triggers) A [PCL](https://developer.pagerduty.com/docs/ZG9jOjM1NTE0MDc0-pcl-overview) condition string which must be satisfied for the trigger to fire.
 
 ## Attributes Reference