update changelog for v1.9.5 (#101)

Author: m-Bilal

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.9.5]
+
+- handle empty `or` and `and` predicates ([#100](https://github.com/hasura/ndc-elasticsearch/pull/100))
+
 ## [1.9.4]
 
 - Prepend correct path to filepaths of user mounted files ([#96](https://github.com/hasura/ndc-elasticsearch/pull/96))