add triggers arguement to allow re-triggering use cases

docs/resources/synchronization_job_provision_on_demand.md

@@ -85,6 +85,7 @@ The following arguments are supported:
 - `synchronization_job_id` (Required) Identifier of the synchronization template this job is based on.
 - `parameter` (Required) One or more `parameter` blocks as documented below.
 - `service_principal_id` (Required) The object ID of the service principal for the synchronization job.
+- `triggers` (Optional) Map of arbitrary keys and values that, when changed, will trigger a re-invocation. To force a re-invocation without changing these keys/values, use the [`terraform taint` command](https://www.terraform.io/docs/commands/taint.html). 
 
 ---
 

internal/services/synchronization/synchronization_job_provision_on_demand_resource.go

@@ -82,6 +82,12 @@ func synchronizationJobProvisionOnDemandResource() *schema.Resource {
 					},
 				},
 			},
+			"triggers": {
+				Type:     schema.TypeMap,
+				Optional: true,
+				ForceNew: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+			},
 		},
 	}
 }