simplifying the Zone group explanation for Local Zones OSDOCS-5240#3

maxwelldb merged 3 commits intomaxwelldb:aws-local-zones-existing-vpc-osdocs5240maxwelldb/openshift-docs:aws-local-zones-existing-vpc-osdocs5240from

mtulio:PR-57427-local-zone-fix-zgmtulio/openshift-docs-dev:PR-57427-local-zone-fix-zgCopy head branch name to clipboard