Explicit in Engagement::Update API doc that it can't be used to update relationships



It’s not possible to use the update engagement API to change the engagement’s associations, but the documentation doesn’t mention this.
Actually, it even gives a link to the create engagement API “for more details about the data that can be used in engagements”, which accepts associations.

So please please please fix this doc. I just lost about one hour coding + one hour wondering why my engagements didn’t appear.