Schema Inaccuracy

Event.type should be an enum.

This request returns events for a user:
https://docs.github.com/en/rest/activity/events?apiVersion=2022-11-28#list-events-for-the-authenticated-user

The example response hints that some options for an event type are WatchEvent and PushEvent, and there are probably more.

Expected

The nature of this field suggests that being a closed set and so it should be an enum.

Reproduction Steps

The field is defined as an ordinary string here:
https://github.com/github/rest-api-description/blob/main/descriptions/ghes-3.7/ghes-3.7.yaml?raw=true
at line 59676 as of revision d25cb45 (don't know how to generate a permalink on files that large).

Not really an inaccuracy, but it prevents compile-time safety when sorting out events.