Rust

Update actions/checkout action to v4 #441

Job	Run time
build-docker (1.63, x86_64-unknown-freebsd)	2m 24s
build-windows (i686, msvc, 1.63)	2m 44s
build-docker (stable, x86_64-unknown-freebsd)	2m 54s
build-unix (1.63, ubuntu)	1m 10s
build-windows (i686, msvc, stable)	3m 0s
build-docker (nightly, x86_64-unknown-freebsd)	2m 24s
build-unix (1.63, macos)	1m 23s
build-windows (i686, msvc, nightly)	2m 27s
build-unix (stable, ubuntu)	52s
build-windows (x86_64, msvc, 1.63)	2m 11s
build-unix (stable, macos)	58s
build-windows (x86_64, msvc, stable)	2m 55s
build-unix (nightly, ubuntu)	47s
build-windows (x86_64, msvc, nightly)	2m 21s
build-unix (nightly, macos)	1m 17s
build-windows (aarch64, msvc, 1.63)	2m 30s
build-windows (aarch64, msvc, stable)	2m 48s
build-windows (aarch64, msvc, nightly)	1m 29s
	36m 34s

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