fix a couple more spots

Author: laurenyu

src/sagemaker/model_monitor/model_monitoring.py

@@ -324,7 +324,7 @@ def create_monitoring_schedule(
             max_runtime_in_seconds=self.max_runtime_in_seconds,
             environment=self.env,
             network_config=network_config_dict,
-            role_arn=self.role,
+            role_arn=self.sagemaker_session.expand_role(self.role),
             tags=self.tags,
         )
 
@@ -1285,7 +1285,7 @@ def create_monitoring_schedule(
             max_runtime_in_seconds=self.max_runtime_in_seconds,
             environment=normalized_env,
             network_config=network_config_dict,
-            role_arn=self.role,
+            role_arn=self.sagemaker_session.expand_role(self.role),
             tags=self.tags,
         )