EventSub: Channel Ad Break Begin Event Example and Reference have inconsistent field names

[iProdigy]

Brief description Channel Ad Break Begin Notification Example has length_seconds and started_at in the event payload.

Channel Ad Break Begin Event refers to those fields as duration and timestamp respectively.

Expected documentation

A single set of correct field names should be used

Screenshots

Additional context or questions Posted here since #docs-feedback goes unread/untriaged

[iProdigy]

length_seconds vs. duration inconsistency has been fixed. started_at vs. timestamp inconsistency remains.

[iProdigy]

length_seconds has been renamed to duration_seconds in eventsub docs

however: started_at vs. timestamp inconsistency remains

[Xemdo]

Last inconsistencies have been fixed