[Observability] 9.0.8 release notes (#3293)

Closes #3202.

---------

Co-authored-by: Nastasha Solomon <[email protected]>

Author: mdbirnstiehl

release-notes/elastic-observability/index.md

@@ -198,6 +198,14 @@ To check for security updates, go to [Security announcements for the Elastic sta
 * Improves finding functions in Universal Profiling [#210437]({{kib-pull}}210437).
 * Adds logical `AND` to monitor tags and locations filter [#217985]({{kib-pull}}217985).
 
+## 9.0.8 [elastic-observability-9.0.8-release-notes]
+
+### Features and enhancements[elastic-observability-9.0.8-features]
+* Allows implementation of a default LLM connector from settings [#236103]({{kib-pull}}236103).
+
+### Fixes [elastic-observability-9.0.8-fixes]
+* Removes span documents from `getServiceAgent` function [#236732]({{kib-pull}}236732).
+
 ## 9.0.7 [elastic-observability-9.0.7-release-notes]
 
 ### Features and enhancements[elastic-observability-9.0.7-features]