Onboard charger: set installation to OCPP 1.6J authentication mode and configure URL

Onboards a charger for OCPP by updating the charger's installation authentication mode to OCPP using the provided ocppUrl.If chargeBoxId is provided, the endpoint also updates the charger setting for ChargeBoxId.Limitations and considerations:- ocppUrl must be a valid WebSocket URL (ws:// or wss://).- The charger must be linked to an installation.You're about to switch the authentication type to OCPP 1.6J. Please note that OCPP 1.6J may incur 4G data consumption costs in the future. Reach out to your dedicated Zaptec Account Manager for more information.