build(deps): bump actions/checkout from 2 to 4 #94

Job	Run time
test (ubuntu-latest, 26.3, false)	28s
test (ubuntu-latest, 27.2, false)	38s
test (ubuntu-latest, 28.2, false)	45s
test (ubuntu-latest, 29.1, false)	1m 8s
test (macos-latest, 26.3, false)	2m 1s
test (macos-latest, 27.2, false)	2m 1s
test (macos-latest, 28.2, false)	2m 20s
test (macos-latest, 29.1, false)	2m 26s
test (windows-latest, 26.3, false)	1m 18s
test (windows-latest, 27.2, false)	1m 24s
test (windows-latest, 28.2, false)	59s
test (windows-latest, 29.1, false)	57s
test (ubuntu-latest, snapshot, true)	1m 58s
test (macos-latest, snapshot, true)	2m 38s
test (windows-latest, snapshot, true)	42s
	21m 43s

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