build

docs: update readthedocs setup #3737

Job	Run time
muon minimal static	40s
nvme-cli (gcc, debug)	42s
nvme-cli (gcc, release)	1m 19s
make static	42s
nvme-cli (clang, debug)	48s
libnvme (gcc, debug)	38s
nvme-cli (clang, release)	54s
libnvme (gcc, release)	48s
libnvme (clang, release)	44s
libnvme (clang, debug)	46s
cross (ppc64le)	53s
build libnvme and nvme-cli separately	37s
cross (s390x)	45s
cross (armhf)	45s
fallback shared libraries	0s
	11m 1s

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