fix: Fix os detection #739

Job	Run time
matrix	17s
check	29s
test-client-matrix	19s
test-client-check	27s
build (x86_64-unknown-linux-musl)	44s
tests	21s
clippy	40s
Check MSRV	26s
build (i686-unknown-linux-musl)	48s
build (armv7-unknown-linux-musleabihf)	1m 24s
build (aarch64-unknown-linux-musl)	1m 9s
build (x86_64-unknown-freebsd)	1m 16s
Build test client (x86_64-unknown-linux-musl)	59s
test-client-clippy	20s
Build test client (i686-unknown-linux-musl)	1m 0s
Build test client (armv7-unknown-linux-musleabihf)	1m 0s
Build test client (aarch64-unknown-linux-musl)	50s
Build test client (x86_64-unknown-freebsd)	47s
Build test client (.exe, x86_64-pc-windows-gnu)	1m 8s
Package nightly release	1m 3s
	15m 27s

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