Fix formatting in the scaled_dot tutorial #3098

Job	Run time
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	13m 2s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	49m 45s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	17m 3s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	27m 6s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	18m 0s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	15m 20s
pytorch_tutorial_build_worker (7, 15, linux.4xlarge.nvidia.gpu)	18m 14s
pytorch_tutorial_build_worker (8, 15, linux.4xlarge.nvidia.gpu)	18m 10s
pytorch_tutorial_build_worker (9, 15, linux.4xlarge.nvidia.gpu)	31m 57s
pytorch_tutorial_build_worker (10, 15, linux.4xlarge.nvidia.gpu)	22m 15s
pytorch_tutorial_build_worker (11, 15, linux.4xlarge.nvidia.gpu)	28m 40s
pytorch_tutorial_build_worker (12, 15, linux.4xlarge.nvidia.gpu)	28m 45s
pytorch_tutorial_build_worker (13, 15, linux.4xlarge.nvidia.gpu)	18m 37s
pytorch_tutorial_build_worker (14, 15, linux.4xlarge.nvidia.gpu)	11m 37s
pytorch_tutorial_build_worker (15, 15, linux.4xlarge.nvidia.gpu)	18m 36s
pytorch_tutorial_build_manager	19m 40s
	5h 56m 47s

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