Other people accepting event invitation results in email saying "invitation updated"

[jancborchardt]

Steps to reproduce

1. Create an event and invite other people
2. Have a person confirm their attendance (or reject, I guess)
3. Check your emails

Expected behaviour

You get an email saying: »Christoph confirmed the invitation« or »Christoph rejected the invitation«

Actual behaviour

This:

cc @georgehrke @nextcloud/calendar

[georgehrke]

Beginning with Nextcloud 9 the CalDAV server became part of Nextcloud's server and the calendar app is just a CalDAV client running in your browser.
Please report issues related to the CalDAV server in Nextcloud's server repo: https://github.com/nextcloud/server/issues

[georgehrke]

reopened in nextcloud/server#11539