Fix typos in colab.rst #4281

Job	Run time
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	23m 57s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	23m 15s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	16m 43s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	16m 15s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	36m 39s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	26m 9s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	34m 3s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	24m 23s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	17m 1s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	19m 18s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	29m 20s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	29m 24s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	21m 11s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	25m 13s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	18m 12s
pytorch_tutorial_build_manager	24m 40s
	6h 25m 43s

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