set max secret ref to 10 to reflect the console limit

Author: Gnoale

internal/services/jobs/definition.go

@@ -95,6 +95,7 @@ func ResourceDefinition() *schema.Resource {
 				Type:        schema.TypeSet,
 				Optional:    true,
 				Description: "A reference to a Secret Manager secret.",
+				MaxItems:    10,
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{
 						"secret_id": {