[2.3.0] Checkmk Werk 16386 created: notification rule: match service levels and match time period being saved with wrong key

[//]: # (werk v2) # notification rule: match service levels and match time period being saved with wrong key key | value ---------- | --- date | 2024-01-19T11:43:30+00:00 version | 2.3.0b1 class | fix edition | cre component | rest-api level | 1 compatible | yes Previously when creating or updating an notification rule via the rest-api, the matching conditions for service levels and time periods were being saved to file with an incorrect key. This werk addresses this issue by correcting the keys being saved.