Update README.md #15

Job	Run time
test (ubuntu-latest, 26.3, false)	42s
test (ubuntu-latest, 27.2, false)	40s
test (ubuntu-latest, 28.2, false)	45s
test (ubuntu-latest, 29.1, false)	41s
test (macos-latest, 26.3, false)	2m 22s
test (macos-latest, 27.2, false)	2m 8s
test (macos-latest, 28.2, false)	2m 27s
test (macos-latest, 29.1, false)	2m 22s
test (windows-latest, 26.3, false)	2m 28s
test (windows-latest, 27.2, false)	1m 32s
test (windows-latest, 28.2, false)	37s
test (windows-latest, 29.1, false)	41s
test (ubuntu-latest, snapshot, true)	38s
test (macos-latest, snapshot, true)	2m 1s
test (windows-latest, snapshot, true)	48s
	20m 52s

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