Sync Gateway RBAC roles incorrectly defined on documentation

The RBAC roles on the documentation for sync gateway endpoint access are incorrect.
https://docs.couchbase.com/server/current/learn/security/roles.html

The correct role names are as follows, based on https://github.com/couchbase/ns_server/blob/master/src/menelaus_roles.erl 

mobile_sync_gateway_architect -> sync_gateway_configurator

mobile_sync_gateway_application -> sync_gateway_app

mobile_sync_gateway_application_read_only -> sync_gateway_app_ro

mobile_sync_gateway_replicator -> sync_gateway_replicator

mobile_sync_gateway_dev_ops -> sync_gateway_dev_ops