fix: simplify readthedocs yml again #192

Job	Run time
Compile binaries on macos-latest x86_64	2m 36s
Compile binaries on ubuntu-latest x86_64	1m 14s
Compile binaries on windows-2019 x64	1s
Compile binaries on macos-latest aarch64	1m 12s
Compile binaries on ubuntu-latest aarch64	2m 19s
	7m 22s

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