Updates an event.
When updating an event with {"recurrenceType": "INSTANCE"}, the
recurrenceType automatically changes to EXCEPTION.
When updating an event with {"recurrenceType": "MASTER"}:
INSTANCE and EXCEPTION events remain unchanged.INSTANCE events, all relevant fields are updated.EXCEPTION events, only changes to the inheritedFields are
applied, while other fields remain unchanged.Event ID.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.