chore: use node20 in cargo-sweep action #3050

Job	Run time
Determine jobs to run	18s
Turborepo Examples	10m 59s
Turborepo rust check	1m 29s
Rust lints	1m 47s
Turborepo Integration (ubuntu-latest)	13m 23s
Turborepo Integration (macos-13)	29m 5s
Turborepo Integration (windows-latest)	28m 20s
Turborepo Rust testing on ubuntu	2m 46s
Turborepo Rust testing on macos	13m 48s
Turborepo Rust testing on windows	18m 18s
Turborepo Test Summary	1s
Cleanup / cleanup	4s
	2h 0m 18s

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