update changelog

Author: jonhealy1

CHANGELOG.md

@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Changed
 
+- Elasticsearch drivers from 7.17.9 to 8.11.0 [#169](https://github.com/stac-utils/stac-fastapi-elasticsearch/pull/169)
+
 ### Fixed
 
 - Exclude unset fields in search response [#166](https://github.com/stac-utils/stac-fastapi-elasticsearch/issues/166)