fix typo in loading model from disk code #2775

Job	Run time
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	14m 35s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	51m 22s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	17m 32s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	25m 24s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	18m 55s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	18m 8s
pytorch_tutorial_build_worker (7, 15, linux.4xlarge.nvidia.gpu)	18m 35s
pytorch_tutorial_build_worker (8, 15, linux.4xlarge.nvidia.gpu)	18m 12s
pytorch_tutorial_build_worker (9, 15, linux.4xlarge.nvidia.gpu)	32m 11s
pytorch_tutorial_build_worker (10, 15, linux.4xlarge.nvidia.gpu)	25m 12s
pytorch_tutorial_build_worker (11, 15, linux.4xlarge.nvidia.gpu)	40m 47s
pytorch_tutorial_build_worker (12, 15, linux.4xlarge.nvidia.gpu)	20m 40s
pytorch_tutorial_build_worker (13, 15, linux.4xlarge.nvidia.gpu)	20m 51s
pytorch_tutorial_build_worker (14, 15, linux.4xlarge.nvidia.gpu)	14m 35s
pytorch_tutorial_build_worker (15, 15, linux.4xlarge.nvidia.gpu)	20m 27s
pytorch_tutorial_build_manager	18m 51s
	6h 16m 17s

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