Improve discoverability of the transformer_building_blocks tutorial #4405

Job	Run time
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	15m 15s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	15m 24s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	15m 14s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	15m 17s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	15m 14s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	15m 9s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	15m 12s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	16m 10s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	15m 9s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	15m 9s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	15m 2s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	15m 9s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	14m 55s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	15m 9s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	15m 5s
pytorch_tutorial_build_manager	1s
	3h 48m 34s

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