Move changelog entry to Unreleased section

Author: aabmass

CHANGELOG.md

@@ -9,14 +9,23 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 > The following components are released independently and maintain individual CHANGELOG files.
 > Use [this search for a list of all CHANGELOG.md files in this repo](https://github.com/search?q=repo%3Aopen-telemetry%2Fopentelemetry-python-contrib+path%3A**%2FCHANGELOG.md&type=code).
 
+## Unreleased
+
+### Added
+
+- Add `opentelemetry-instrumentation-openai-v2` to `opentelemetry-bootstrap`
+  ([#2996](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2996))
+
+### Fixed
+
+### Breaking changes
+
 ## Version 1.28.1/0.49b1 (2024-11-08)
 
 ### Added
 
 - `opentelemetry-instrumentation-sqlalchemy` Update unit tests to run with SQLALchemy 2
   ([#2976](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2976))
-  - Add `opentelemetry-instrumentation-openai-v2` to `opentelemetry-bootstrap`
-  ([#2996](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2996))
 
 ### Fixed