Fix notarize step: extract binary from dist tarball #16

Job	Run time
plan	18s
build-local-artifacts (aarch64-apple-darwin)	4m 23s
build-local-artifacts (aarch64-unknown-linux-gnu)	2m 27s
build-local-artifacts (x86_64-pc-windows-msvc)	9m 17s
build-local-artifacts (x86_64-apple-darwin)	9m 24s
build-local-artifacts (x86_64-unknown-linux-gnu)	2m 23s
build-global-artifacts	22s
host	21s
announce	6s
	29m 1s

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