Bump actions/checkout from 4 to 5 (#24) #15

Job	Run time
test (ubuntu-latest, 27.2, false)	49s
test (ubuntu-latest, 28.2, false)	38s
test (ubuntu-latest, 26.3, false)	47s
test (macos-latest, 28.2, false)	2m 44s
test (ubuntu-latest, 29.4, false)	37s
test (macos-latest, 30.1, false)	2m 17s
test (macos-latest, 29.4, false)	2m 26s
test (ubuntu-latest, 30.1, false)	32s
test (windows-latest, 26.3, false)	1h 20m 5s
test (windows-latest, 29.4, false)	1h 19m 58s
test (windows-latest, 27.2, false)	41m 54s
test (ubuntu-latest, snapshot, true)	35s
test (windows-latest, 30.1, false)	54m 15s
test (windows-latest, snapshot, true)	1h 9m 20s
test (windows-latest, 28.2, false)	41m 32s
test (macos-latest, snapshot, true)	2m 28s
	6h 20m 57s

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