Bump actions/download-artifact from 1 to 4 in /.github/workflows #183

Job	Run time
Builds (ubuntu-22.04, aarch64-linux-android)	1m 18s
Test Suite (stable)	7m 4s
Rustfmt	2m 40s
Builds (ubuntu-22.04, x86_64-unknown-linux-musl)	1m 10s
Bench (current, refs/pull/184/merge)	6m 2s
Test Suite (beta)	6m 49s
Builds (ubuntu-22.04, wasm32-unknown-unknown, --features wasm --no-default-features)	3m 3s
Bench (base, main)	4m 9s
Test Suite (1.63.0)	3m 4s
Builds (macos-12, aarch64-apple-ios)	3m 32s
Builds (macos-12, x86_64-apple-darwin)	1m 26s
Builds (macos-12, aarch64-apple-darwin)	1m 24s
Builds (windows-2019, x86_64-pc-windows-msvc)	5m 37s
Upload benchmark results	3m 14s
	50m 32s

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