release notes

Author: CharlesDuboisSAP

docs/release_notes.md

@@ -12,7 +12,7 @@
 
 ### ✨ New Functionality
 
-- [Orchestration] Added new models for `OrchestrationAiModel`: `SONAR`,`SONAR_PRO`.
+- [Orchestration] Added new models for `OrchestrationAiModel`: `SONAR`,`SONAR_PRO`, `GEMINI_2_5_FLASH_LITE`.
 - [Orchestration] Convenience for adding the `metadata_params` option to grounding calls.
 
 ### 📈 Improvements