add changelog entries

Author: marceljk

CHANGELOG.md

@@ -19,6 +19,8 @@
       - **Feature:** add attribute `vpcId` to model `Network`,
       - **Feature:** add attribute `vtpm` (new model `ServerVTPM`) to model `Server`,
       - **Feature:** add attribute `availabilityZone` to model `Snapshot`,
+- `serverupdate`: [v0.2.1](services/serverupdate/CHANGELOG.md#v021)
+  - `v1api`: **Docs:** Extend the description of the attributes `rrule` and `maintenanceWindow`
 
 ## Release (2026-04-28)
 - `alb`: [v0.5.0](services/alb/CHANGELOG.md#v050)

services/serverupdate/CHANGELOG.md

@@ -1,3 +1,6 @@
+## v0.2.1
+- `v1api`: **Docs:** Extend the description of the attributes `rrule` and `maintenanceWindow`
+
 ## v0.2.0
 - **Feature (breaking change):** Introduction of multi API version support. See the GitHub discussion post for more details: https://github.com/stackitcloud/stackit-sdk-java/discussions/530
 

services/serverupdate/VERSION

@@ -1 +1 @@
-0.2.0
+0.2.1