macOS

doc: remove `nproc` suggestion #123

Job	Run time
macOS / Build fmt	3s
macOS / Download validation files	30s
macOS / Build HIPO	32s
macOS / Generate documentation	0s
macOS / Deploy documentation	0s
macOS / Build Iguana (cpp)	45s
macOS / Build Iguana (python)	42s
macOS / Test consumer builds (cmake)	42s
macOS / Test Iguana (cpp)	24s
macOS / Test consumer builds (make)	33s
macOS / Test Iguana (python)	3m 0s
macOS / Test consumer builds (meson)	34s
macOS / Final	3s
	7m 48s

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