Generator: Update SDK /services/observability (#911)

* Generate observability

* Update changelog

---------

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

Author: stackit-pipeline

services/observability/CHANGELOG.md

@@ -1,7 +1,9 @@
-## v0.1.0 (2024-08-21)
-First release.
+## v0.2.0 (2024-10-14)
 
-This module offers the same functionalities as `argus` (release [v0.11.0](https://github.com/stackitcloud/stackit-sdk-go/blob/main/services/argus/CHANGELOG.md#v0110-2024-05-23).
+- **Feature:** Add support for nullable models
 
+## v0.1.0 (2024-08-21)
 
+First release.
 
+This module offers the same functionalities as `argus` (release [v0.11.0](https://github.com/stackitcloud/stackit-sdk-go/blob/main/services/argus/CHANGELOG.md#v0110-2024-05-23).