🐛 [fs-bq-export] README fails to mention "Enable Events"

- Extension name: firestore-bigquery-export
- Extension version: 0.1.57

The README mentions the meaning of each option presented during execution of `firebase ext:update` except for the very last one: "Enable Events". This is in the README at the end of the section *** Configuration Parameters***, just before the section ***Cloud Functions***.

When running that command the final prompt has the text:
> Enable Events: If you enable events, you can write custom event handlers
> (https://firebase.google.com/docs/extensions/install-extensions#eventarc) that respond to these events.
>
> You can always enable or disable events later. Events will be emitted via Eventarc. Fees apply
> (https://cloud.google.com/eventarc/pricing).
>
> ? Would you like to enable events? (y/N)