Bump actions/checkout from 4 to 5 (#324) #588

Job	Run time
Run benchmarks on macos-13	11m 50s
Run benchmarks on macos-latest	11m 16s
Run benchmarks on windows-latest	9m 53s
Run benchmarks on ubuntu-latest	24m 47s
Process benchmark results for KMP JSON schema validator	9s
Process benchmark results for Compare KMP JSON schema validator	10s
	58m 5s

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