ci: use main `hipo` fork and latest tag #118

Job	Run time
macOS / Build fmt	2s
macOS / Build HIPO	49s
macOS / Generate documentation	0s
macOS / Download validation files	24s
macOS / Deploy documentation	0s
macOS / Build Iguana (cpp)	1m 6s
macOS / Build Iguana (python)	58s
macOS / Test consumer builds (cmake)	30s
macOS / Test consumer builds (make)	28s
macOS / Test consumer builds (meson)	29s
macOS / Test Iguana (cpp)	24s
macOS / Test Iguana (python)	4m 41s
macOS / Final	1s
	9m 52s

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