chore(deps): update actions/checkout action to v5 (#1298) #2960

Job	Run time
test_min_deps (ubuntu-latest)	46s
test_min_deps (macos-latest)	48s
test_min_deps (windows-latest)	1m 13s
Integration Tests (pdm.lock)	27s
Integration Tests (pdm.minimal.lock)	23s
test (3.10, macos-latest)	1m 14s
test (3.9, macos-latest)	1m 27s
test (3.10, ubuntu-latest)	1m 19s
test (3.11, macos-latest)	1m 4s
test (3.10, windows-latest)	1m 41s
test (3.9, ubuntu-latest)	1m 26s
test (3.12, windows-latest)	1m 49s
test (3.9, windows-latest)	2m 17s
test (3.13, ubuntu-latest)	1m 32s
test (3.12, ubuntu-latest)	1m 24s
test (3.12, macos-latest)	49s
test (3.13, macos-latest)	43s
test (3.11, windows-latest)	1m 36s
test (3.11, ubuntu-latest)	1m 16s
test (3.13, windows-latest)	1m 46s
Combine & check coverage	13s
	25m 13s

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