docs: Update 'master_inventory.yml'
docs: Update 'master_inventory.yml'

Update reflects changes in the 'config.yml' file in commit (9d61f87).

Change-Id: I769f2d200e21836606a2ea73005aa828772b0dfd

open-power-ref-design-toolkit/cluster-genesis,open-power-ref-design-toolkit/cluster-genesis