fix job name in optimizer table

sky/optimizer.py

@@ -837,7 +837,7 @@ def _get_resource_group_hash(resources: 'resources_lib.Resources'):
                 json.dumps(resource.to_yaml_config()): cost
                 for resource, cost in v.items()
             }
-            task_str = (f'for task {repr(task)!r} ' if num_tasks > 1 else '')
+            task_str = (f'for task {task.name!r} ' if num_tasks > 1 else '')
             plural = 's' if task.num_nodes > 1 else ''
             logger.info(
                 f'{colorama.Style.BRIGHT}Considered resources {task_str}'