[2.3.0] Checkmk Werk 16472 created: iLert notifications: ignore error when event is already closed

[//]: # (werk v2) # iLert notifications: ignore error when event is already closed key | value ---------- | --- date | 2024-02-07T16:05:25+00:00 version | 2.3.0b1 class | fix edition | cre component | notifications level | 1 compatible | yes When attempting to resolve an incident which was already manually resolved, an error occured. This kind of error will now be ignored.