CI/CD: Bump upload-artifact to v4 #526

Job	Run time
build-multilib	0s
test-sim (ubuntu-24.04, newlib, rv64gc-lp64d, spike)	2h 45m 32s
build (ubuntu-22.04, newlib, rv32gc-ilp32d, gcc)	47m 2s
build (ubuntu-22.04, newlib, rv32gc-ilp32d, llvm)	2h 11m 17s
build (ubuntu-22.04, newlib, rv64gc-lp64d, gcc)	46m 42s
build (ubuntu-22.04, newlib, rv64gc-lp64d, llvm)	2h 10m 52s
build (ubuntu-22.04, linux, rv32gc-ilp32d, gcc)	52m 52s
build (ubuntu-22.04, linux, rv32gc-ilp32d, llvm)	2h 14m 52s
build (ubuntu-22.04, linux, rv64gc-lp64d, gcc)	56m 53s
build (ubuntu-22.04, linux, rv64gc-lp64d, llvm)	2h 19m 47s
build (ubuntu-22.04, musl, rv32gc-ilp32d, gcc)	48m 29s
build (ubuntu-22.04, musl, rv64gc-lp64d, gcc)	48m 37s
build (ubuntu-22.04, uclibc, rv32gc-ilp32d, gcc)	40m 31s
build (ubuntu-22.04, uclibc, rv64gc-lp64d, gcc)	43m 12s
build (ubuntu-24.04, newlib, rv32gc-ilp32d, gcc)	2h 23m 15s
build (ubuntu-24.04, newlib, rv32gc-ilp32d, llvm)	2h 23m 14s
build (ubuntu-24.04, newlib, rv64gc-lp64d, gcc)	2h 22m 50s
build (ubuntu-24.04, newlib, rv64gc-lp64d, llvm)	2h 23m 36s
build (ubuntu-24.04, linux, rv32gc-ilp32d, gcc)	3h 14m 10s
build (ubuntu-24.04, linux, rv32gc-ilp32d, llvm)	2h 30m 37s
build (ubuntu-24.04, linux, rv64gc-lp64d, gcc)	3h 27m 45s
build (ubuntu-24.04, linux, rv64gc-lp64d, llvm)	2h 35m 37s
build (ubuntu-24.04, musl, rv32gc-ilp32d, gcc)	53m 31s
build (ubuntu-24.04, musl, rv64gc-lp64d, gcc)	54m 33s
build (ubuntu-24.04, uclibc, rv32gc-ilp32d, gcc)	45m 26s
build (ubuntu-24.04, uclibc, rv64gc-lp64d, gcc)	47m 3s
	1d 18h 48m 15s

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