add changelog

Author: alizenhom

instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- Added a wrapper for `AsyncCompletions.create` inside `src/opentelemetry/instrumentation/openai_v2/__init__.py` to instrument async chat completions
+- Created a new patch function for async chat completions
+- Abstracted handling span exceptions into it's own function as it was getting used in multiple places
+- Adjusted `StreamWrapper` to include async methods for supporting async streaming
+- Added Tests using `pytest-asyncio` fixtures
+
 ## Version 2.0b0 (2024-11-08)
 
 - Use generic `OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT` environment variable