Fix the underline that is too short in torchrec_intro_tutorial.py (#3… #3074

Job	Run time
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	15m 53s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	51m 20s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	20m 4s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	30m 11s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	19m 28s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	17m 19s
pytorch_tutorial_build_worker (7, 15, linux.4xlarge.nvidia.gpu)	21m 12s
pytorch_tutorial_build_worker (8, 15, linux.4xlarge.nvidia.gpu)	20m 31s
pytorch_tutorial_build_worker (9, 15, linux.4xlarge.nvidia.gpu)	34m 48s
pytorch_tutorial_build_worker (10, 15, linux.4xlarge.nvidia.gpu)	24m 47s
pytorch_tutorial_build_worker (11, 15, linux.4xlarge.nvidia.gpu)	30m 3s
pytorch_tutorial_build_worker (12, 15, linux.4xlarge.nvidia.gpu)	31m 41s
pytorch_tutorial_build_worker (13, 15, linux.4xlarge.nvidia.gpu)	21m 40s
pytorch_tutorial_build_worker (14, 15, linux.4xlarge.nvidia.gpu)	14m 21s
pytorch_tutorial_build_worker (15, 15, linux.4xlarge.nvidia.gpu)	22m 18s
pytorch_tutorial_build_manager	19m 27s
	6h 35m 3s

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