Update CHANGELOG.md (#44045)

Author: M-Hietala

sdk/ai/azure-ai-projects/CHANGELOG.md

@@ -3,14 +3,15 @@
 ## 2.0.0b2 (Unreleased)
 
 ### Features Added
+* Tracing: support for workflow agent tracing.
 
 ### Breaking changes
 
 * `get_openai_client()` method on the asynchronous AIProjectClient is no longer an "async" method.
-* Tracing: tool call output event content format updated to be in line with other events
+* Tracing: tool call output event content format updated to be in line with other events.
 
 ### Bugs Fixed
-* Tracing: operation name attribute added to create agent span, token usage added to streaming response generation span
+* Tracing: operation name attribute added to create agent span, token usage added to streaming response generation span.
 
 ### Sample updates
 * Added `finetuning` samples for operations create, retrieve, list, list_events, list_checkpoints, cancel, pause and resume. Also, these samples includes various finetuning techniques like Supervised (SFT), Reinforcement (RFT) and Direct performance optimization (DPO).