Notify when new time or place for match is proposed

[PoJo93]

AS an attendee of a match (so part of the teams playing against each other)
I WANT TO be notified per email when the place or time for a match changes
TO not miss the game when someone else proposes a new time or place

ACCEPTANCE CRITERIA

• When the time or place of a match changes like described in Propose a new Appointment #148 a email will be send to all participants in that match
  - [ ] The email informing everyone of the new update says:

Hey PARTICIPANT NAME,
die Zeit bzw. der Ort des Spieles gegen NAME OF OPPONENT TEAM aus dem Event EVENTNAME hat sich geändert. Die neuen Daten sind:

Ort: PLACE
Datum und Zeit: EVENT DATE TIME

Viel Spaß beim Spiel!
Dein Team von Sportify