Bump actions/checkout from 4 to 5 #67

Job	Run time
test (ubuntu-latest, 28.2, false)	1m 21s
test (windows-latest, 27.2, false)	31m 18s
test (ubuntu-latest, 27.2, false)	38s
test (windows-latest, 29.4, false)	49m 41s
test (ubuntu-latest, 29.4, false)	1m 24s
test (macos-latest, 30.1, false)	3m 6s
test (ubuntu-latest, 30.1, false)	1m 5s
test (macos-latest, snapshot, true)	2m 31s
test (macos-latest, 29.4, false)	4m 1s
test (windows-latest, 28.2, false)	3m 36s
test (macos-latest, 28.2, false)	2m 55s
test (windows-latest, 30.1, false)	1h 41m 44s
test (ubuntu-latest, snapshot, true)	54s
test (windows-latest, snapshot, true)	2m 9s
	3h 26m 23s

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