chore: Update to actions/checkout@v4 #2160

Job	Run time
cargo-deny check	27s
Interop Tests (ubuntu-latest)	1m 24s
Interop Tests (macOS-latest)	2m 19s
Interop Tests (windows-latest)	3m 32s
check (ubuntu-latest)	2m 19s
check (macOS-latest)	4m 52s
check (windows-latest)	5m 30s
codegen	41s
Check MSRV	3m 25s
rustfmt	11s
test (ubuntu-latest)	5m 26s
test (macOS-latest)	4m 59s
test (windows-latest)	10m 54s
Check unused dependencies (ubuntu-latest)	5m 39s
Check unused dependencies (macOS-latest)	11m 29s
Check unused dependencies (windows-latest)	13m 36s
	1h 16m 43s

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