fix output; update README #58

Job	Run time
linux (x86_64)	1m 49s
musllinux (x86_64-unknown-linux-musl)	1m 49s
linux-cross (aarch64)	2m 14s
linux (i686)	2m 22s
musllinux (i686-unknown-linux-musl)	1m 44s
macos	3m 6s
linux-cross (armv7)	2m 28s
windows (x64)	3m 5s
musllinux-cross (aarch64-unknown-linux-musl, aarch64)	1m 46s
windows (x86)	4m 8s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	1m 32s
Debian package	1m 10s
Release	17s
	27m 30s

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