Bump actions/download-artifact from 1 to 4 in /.github/workflows (#184) #186

Job	Run time
Rustfmt	2m 40s
Builds (ubuntu-22.04, aarch64-linux-android)	1m 45s
Bench	0s
Builds (ubuntu-22.04, x86_64-unknown-linux-musl)	1m 48s
Test Suite (stable)	6m 44s
Builds (ubuntu-22.04, wasm32-unknown-unknown, --features wasm --no-default-features)	3m 41s
Test Suite (beta)	6m 36s
Builds (macos-12, aarch64-apple-ios)	2m 14s
Test Suite (1.70.0)	7m 16s
Builds (macos-12, x86_64-apple-darwin)	1m 59s
Builds (macos-12, aarch64-apple-darwin)	4m 17s
Builds (windows-2019, x86_64-pc-windows-msvc)	7m 2s
Upload benchmark results	0s
	46m 2s

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