Updated changelog

Author: hectorhdzg

CHANGELOG.md

@@ -16,6 +16,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-instrumentation-botocore` Use `cloud.region` instead of `aws.region` span attribute as per semantic conventions.
   ([#3474](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3474))
 
+### Added
+
+- `opentelemetry-instrumentation-httpx` Add support for HTTP metrics
+  ([#3513](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3513))
+
 
 ## Version 1.33.0/0.54b0 (2025-05-09)