Update CHANGELOG.md

Co-authored-by: Emídio Neto <[email protected]>

Author: Kludex

CHANGELOG.md

@@ -11,7 +11,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-- `opentelemetry-instrumentation-httpx` Update `RequestInfo`/`ResponseInfo` type hints
+### Fixed
+
+- `opentelemetry-instrumentation-httpx` Fix `RequestInfo`/`ResponseInfo` type hints
   ([#3105](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3105))
 
 ## Version 1.29.0/0.50b0 (2024-12-11)