docs: fix misspellings #17605

Job	Run time
old	6m 58s
race	7m 15s
dashboard	2m 8s
arch (presubmit_arch_freebsd)	6m 21s
build	4m 26s
arch (presubmit_arch_linux)	10m 25s
gvisor	3m 55s
arch (presubmit_arch_windows)	3m 43s
aux	3m 54s
arch (presubmit_arch_netbsd)	3m 52s
arch (presubmit_arch_darwin)	3m 36s
arch (presubmit_arch_executor)	3m 17s
race_dashboard	4m 0s
arch (presubmit_arch_openbsd)	3m 40s
	1h 7m 30s

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