chore: add comment to clarify that org_id usage
chore: add comment to clarify that org_id usage

As described here: https://community.grafana.com/t/many-to-many-group-dn-org-role-mapping-in-ldap-config/729/2 org_id can be used to allow multiple group_dn's to map to the same org_role provided the org_id differs.
grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana