chore(release): v0.8.4 — aarch64-linux-musl + install.sh polish #13

Job	Run time
build aarch64-unknown-linux-musl	1m 37s
build x86_64-apple-darwin	1m 21s
build x86_64-unknown-linux-musl	1m 22s
build aarch64-apple-darwin	1m 24s
publish release	16s
	6m 0s

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