chore: fill the change log for #500 (#556)

*Issue #, if available:*

*Description of changes:*
Add change log for
#500

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Author: wangzlei

CHANGELOG.md

@@ -22,6 +22,8 @@ If your change does not need a CHANGELOG entry, add the "skip changelog" label t
 - Refactor configuration for adding Application Signals Dimensions to EMF exporter
   ([#552](https://github.com/aws-observability/aws-otel-python-instrumentation/pull/552))
 - Fix CVE-2025-66471. No associated PR since `urllib3` dependency will auto-bump to `2.6.x` upon release.
+- Update opentelemetry-sdk-extension-aws to version 2.1.0
+  ([#500](https://github.com/aws-observability/aws-otel-python-instrumentation/pull/500))
 
 ## v0.14.0 - 2025-11-19
 - Add Resource and CFN Attributes for Bedrock AgentCore spans