Update changelog

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

CHANGELOG.md

@@ -23,6 +23,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Bump `github.com/wI2L/jsondiff` from 0.6.0 to 0.6.1 ([#643](https://github.com/opensearch-project/opensearch-go/pull/643))
 - Bump `github.com/aws/aws-sdk-go-v2` from 1.32.2 to 1.36.1 ([#664](https://github.com/opensearch-project/opensearch-go/pull/664))
 - Bump `github.com/stretchr/testify` from 1.9.0 to 1.10.0 ([#644](https://github.com/opensearch-project/opensearch-go/pull/644))
+- Bump `github.com/aws/aws-sdk-go-v2/config` from 1.27.43 to 1.29.6 ([#665](https://github.com/opensearch-project/opensearch-go/pull/665))
 
 ## [4.3.0]