update changelog

Author: jonhealy1

CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Added option to include Basic Auth [#232](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/232)
 
+### Changed
+
+- Upgrade stac-fastapi libaries to v2.5.5 [#237](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/237)
+
 ### Fixed
 
 - Fixed `POST /collections/test-collection/items` returning an item with an empty links array [#236](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/236)