fix a typo of precision help doc #26090

Job	Run time
build-packages / init	3s
build-packages / build-packages (lightning)	24s
build-packages / build-packages (fabric)	23s
build-packages / build-packages (pytorch)	22s
install-pkg (ubuntu-22.04, fabric, 3.9)	1m 38s
install-pkg (ubuntu-22.04, fabric, 3.11)	1m 27s
install-pkg (ubuntu-22.04, pytorch, 3.9)	1m 39s
install-pkg (ubuntu-22.04, pytorch, 3.11)	1m 34s
install-pkg (ubuntu-22.04, lightning, 3.9)	2m 6s
install-pkg (ubuntu-22.04, lightning, 3.11)	2m 2s
install-pkg (ubuntu-22.04, notset, 3.9)	2m 2s
install-pkg (ubuntu-22.04, notset, 3.11)	1m 45s
install-pkg (macOS-12, fabric, 3.9)	1m 8s
install-pkg (macOS-12, fabric, 3.11)	58s
install-pkg (macOS-12, pytorch, 3.9)	1m 20s
install-pkg (macOS-12, pytorch, 3.11)	1m 30s
install-pkg (macOS-12, lightning, 3.9)	1m 18s
install-pkg (macOS-12, lightning, 3.11)	1m 5s
install-pkg (macOS-12, notset, 3.9)	1m 9s
install-pkg (macOS-12, notset, 3.11)	1m 6s
install-pkg (windows-2022, fabric, 3.9)	1m 35s
install-pkg (windows-2022, fabric, 3.11)	1m 53s
install-pkg (windows-2022, pytorch, 3.9)	2m 29s
install-pkg (windows-2022, pytorch, 3.11)	2m 30s
install-pkg (windows-2022, lightning, 3.9)	2m 28s
install-pkg (windows-2022, lightning, 3.11)	2m 34s
install-pkg (windows-2022, notset, 3.9)	2m 29s
install-pkg (windows-2022, notset, 3.11)	2m 11s
	43m 8s

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