chore: Update to actions/checkout@v4 #2279

Job	Run time
codegen	17s
cargo-deny check	20s
Interop Tests (ubuntu-latest)	22s
Check MSRV	27s
check (ubuntu-latest)	50s
Interop Tests (macOS-latest)	1m 3s
rustfmt	10s
Interop Tests (windows-latest)	2m 54s
check (macOS-latest)	1m 53s
check (windows-latest)	1m 40s
test (ubuntu-latest)	2m 46s
Check unused dependencies (ubuntu-latest)	3m 53s
test (macOS-latest)	6m 6s
Check unused dependencies (macOS-latest)	11m 29s
test (windows-latest)	3m 48s
Check unused dependencies (windows-latest)	6m 55s
	44m 53s

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