add changelog

Signed-off-by: emdneto <[email protected]>

Author: emdneto

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- Add Python 3.13 support
+  ([#4353](https://github.com/open-telemetry/opentelemetry-python/pull/4353))
+
 ## Version 1.29.0/0.50b0 (2024-12-11)
 
 - Fix crash exporting a log record with None body