firebase ext:info doesn't mention events

[cabljac]

A documentation issue was opened in firebase extensions:
https://github.com/firebase/extensions/blob/next/firestore-bigquery-export/README.md

We generate our README using firebase ext:info, so I am opening an issue here to track it.

[REQUIRED] Environment info

firebase-tools: 13.30.0

Platform: macOS

[REQUIRED] Test case

(any of the official extensions that support events)

[REQUIRED] Steps to reproduce

1. clone the firebase/extensions repository
2. run firebase ext:info firestore-bigquery-export --markdown > ./README.md or similar

[REQUIRED] Expected behavior

Event information to be included in the extension info

[REQUIRED] Actual behavior

It doesn't contain any information about the extensions events.