Before this commit, a notification was sent to all the attendees whenever a past event was modified. Now the notification is only sent if the event is taking place in the future. closes odoo/odoo#63015 Taskid: 2409394 X-original-commit: e31819bccec604ba61c053015304abebdd189690 Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com> Signed-off-by: Kevin Baptiste <kba@odoo.com>