Add SKE deprecation note to the Changelog (#407)

* add deprecation note to the Changelog

* Update services/ske/CHANGELOG.md

Co-authored-by: Vicente Pinto <[email protected]>

---------

Co-authored-by: Vicente Pinto <[email protected]>

Author: GokceGK

services/ske/CHANGELOG.md

@@ -1,3 +1,9 @@
+## v0.13.0 (2024-04-16)
+- **Deprecation:** The following methods have been deprecated and the [Service Enablement API](https://docs.api.stackit.cloud/documentation/service-enablement/version/v1) must be used instead.
+  - `DisableService`
+  - `EnableService`
+  - `GetServiceStatus`
+
 ## v0.12.0 (2024-04-09)
 
 - Set config.ContextHTTPRequest in Execute method