update CHANGELOG

Author: jj22ee

CHANGELOG.md

@@ -12,3 +12,8 @@ For any change that affects end users of this package, please add an entry under
 If your change does not need a CHANGELOG entry, add the "skip changelog" label to your PR.
 
 ## Unreleased
+
+### Enhancements
+
+- Support X-Ray Trace Id extraction from Lambda Context object, and respect user-configured OTEL_PROPAGATORS in AWS Lamdba instrumentation
+  ([#1191](https://github.com/aws-observability/aws-otel-java-instrumentation/pull/1191))