build

build: fix readthedocs html install path #3741

Job	Run time
cross (ppc64le)	53s
make static	35s
cross (s390x)	59s
nvme-cli (gcc, release)	56s
muon minimal static	37s
cross (armhf)	45s
build libnvme and nvme-cli separately	40s
nvme-cli (clang, release)	1m 0s
libnvme (gcc, debug)	41s
libnvme (clang, debug)	42s
fallback shared libraries	1m 39s
libnvme (clang, release)	54s
nvme-cli (clang, debug)	52s
libnvme (gcc, release)	41s
nvme-cli (gcc, debug)	42s
	12m 36s

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