[torchrec tutorial] fix headings #3122

Job	Run time
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	15m 0s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	52m 43s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	19m 29s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	30m 55s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	20m 26s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	17m 54s
pytorch_tutorial_build_worker (7, 15, linux.4xlarge.nvidia.gpu)	18m 34s
pytorch_tutorial_build_worker (8, 15, linux.4xlarge.nvidia.gpu)	20m 35s
pytorch_tutorial_build_worker (9, 15, linux.4xlarge.nvidia.gpu)	32m 43s
pytorch_tutorial_build_worker (10, 15, linux.4xlarge.nvidia.gpu)	23m 8s
pytorch_tutorial_build_worker (11, 15, linux.4xlarge.nvidia.gpu)	28m 17s
pytorch_tutorial_build_worker (12, 15, linux.4xlarge.nvidia.gpu)	19m 14s
pytorch_tutorial_build_worker (13, 15, linux.4xlarge.nvidia.gpu)	25m 0s
pytorch_tutorial_build_worker (14, 15, linux.4xlarge.nvidia.gpu)	12m 24s
pytorch_tutorial_build_worker (15, 15, linux.4xlarge.nvidia.gpu)	20m 47s
pytorch_tutorial_build_manager	20m 27s
	6h 17m 36s

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