Fix typo in `log_graph` docs (#19254) #484

Job	Run time
release-version	41s
build-packages / init	8s
build-packages / build-packages (lightning)	28s
build-packages / build-packages (app)	31s
build-packages / build-packages (fabric)	23s
build-packages / build-packages (pytorch)	31s
signaling	0s
pre-publish-packages	0s
upload-packages	0s
legacy-checkpoints / create-legacy-ckpts	51s
waiting	0s
publish-packages	0s
legacy-checkpoints / add-ckpt-test	0s
	3m 33s

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