Update the url or event types a webhook is subscribed to. Pass the following arguments in the request body:
url (string, required) - The URL you want Bonusly to POST to, eg "https://foobarbaz.com".
event_types (array, optional) - The array of event types you want to be notified of. If present, it can only contain the strings "bonus.created" and/or "achievement_event.created".