add changelog entries

Author: rubenhoenle

CHANGELOG.md

@@ -8,6 +8,10 @@
   - **Breaking change:** Renamed `TargetPoolTlsConfig` to `TlsConfig`
 - `loadbalancer`: [v1.8.0](services/loadbalancer/CHANGELOG.md#v180)
   - **Feature:** Add new fields `AltPort` and `HttpHealthCheck` to `ActiveHealthCheck`
+- `resourcemanager`: [v0.19.0](services/resourcemanager/CHANGELOG.md#v0190)
+  - **Feature:** Introduction of multi-API-version support for the resourcemanager SDK module. For more details please see the announcement on GitHub: https://github.com/stackitcloud/stackit-sdk-go/discussions/5062
+  - `v0api`: New package which should be used for communication with the STACKIT Resourcemanager API in the future
+  - **Deprecation:** The contents in the root of this SDK module including the `wait` package are marked as deprecated and will be removed after 2026-09-30. Switch to the new `v0api` package instead.
 
 ## Release (2026-02-20)
 - `core`: [v0.21.1](core/CHANGELOG.md#v0211) 

services/resourcemanager/CHANGELOG.md

@@ -1,3 +1,8 @@
+## v0.19.0
+- **Feature:** Introduction of multi-API-version support for the resourcemanager SDK module. For more details please see the announcement on GitHub: https://github.com/stackitcloud/stackit-sdk-go/discussions/5062
+- `v0api`: New package which should be used for communication with the STACKIT Resourcemanager API in the future
+- **Deprecation:** The contents in the root of this SDK module including the `wait` package are marked as deprecated and will be removed after 2026-09-30. Switch to the new `v0api` package instead.
+
 ## v0.18.5
 - Bump STACKIT SDK core module from `v0.21.0` to `v0.21.1`
 

services/resourcemanager/VERSION

@@ -1 +1 @@
-v0.18.5
+v0.19.0