build(deps): bump actions/checkout from 3 to 4 (#4) #45

Job	Run time
test (ubuntu-latest, 27.2, false)	50s
test (ubuntu-latest, 28.2, false)	1m 8s
test (ubuntu-latest, 29.1, false)	49s
test (macos-latest, 27.2, false)	2m 40s
test (macos-latest, 28.2, false)	5m 23s
test (macos-latest, 29.1, false)	2m 55s
test (windows-latest, 27.2, false)	1m 7s
test (windows-latest, 28.2, false)	1m 10s
test (windows-latest, 29.1, false)	1m 0s
test (ubuntu-latest, snapshot, true)	48s
test (macos-latest, snapshot, true)	2m 24s
test (windows-latest, snapshot, true)	1m 22s
	21m 36s

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