linting: add return statement

Author: Laure-di

scaleway/tests/test_instance.py

@@ -51,7 +51,7 @@ def wait_test_instance_server(self, server_id):
 
             time.sleep(int)
 
-        self.fail("Server did not reach 'running' state in time.")
+        return self.fail("Server did not reach 'running' state in time.")
 
     def create_test_instance_server(self) -> Server:
         volumes = dict[str, VolumeServerTemplate]()