Updated sha ref of veda-consulting/uk.co.vedaconsulting.mailchimp
Updated sha ref of veda-consulting/uk.co.vedaconsulting.mailchimp

See https://github.com/openstreetmap/chef/pull/259#issuecomment-600422643

tomhughes/openstreetmap-chef,openstreetmap/chef,openstreetmap/chef,tomhughes/openstreetmap-chef,openstreetmap/chef,tomhughes/openstreetmap-chef,zerebubuth/openstreetmap-chef,zerebubuth/openstreetmap-chef,openstreetmap/chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef,openstreetmap/chef,tomhughes/openstreetmap-chef,openstreetmap/chef,openstreetmap/chef,zerebubuth/openstreetmap-chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef,zerebubuth/openstreetmap-chef,zerebubuth/openstreetmap-chef,openstreetmap/chef,tomhughes/openstreetmap-chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef