Update documentation to use conda instead of mamba #908

Job	Run time
linux-64-py3.10	11m 2s
win-64	20m 42s
macOS	7m 1s
random_seed_generation_test	8m 35s
prototype_marin	7m 28s
prototype_mtc_extended	1h 13m 43s
prototype_mtc	45m 57s
prototype_sandag_xborder	9m 52s
Standard 2-Zone Example (SANDAG)	1h 1m 16s
Standard 1-Zone Example (MTC)	46m 37s
prototype_mwcog	41m 43s
placeholder_psrc	37m 48s
Estimation Mode Unit Tests	22m 8s
placeholder_sandag	1h 52m 41s
placeholder_multiple_zone	14m 1s
develop-docbuild	0s
production_semcog	10m 57s
	8h 51m 31s

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