Update CHANGELOG.md

Author: xrmx

CHANGELOG.md

@@ -77,7 +77,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#4755](https://github.com/open-telemetry/opentelemetry-python/pull/4755))
 - logs: extend Logger.emit to accept separated keyword arguments
   ([#4737](https://github.com/open-telemetry/opentelemetry-python/pull/4737))
-
+- logs: add warnings for classes that would be deprecated and renamed in 1.39.0
+  ([#4771](https://github.com/open-telemetry/opentelemetry-python/pull/4771))
 
 ## Version 1.37.0/0.58b0 (2025-09-11)