update changelog

Author: m-Bilal

changelog.md

@@ -1,5 +1,9 @@
 # Open API Lambda Connector Changelog
 
+## Unreleased
+
+- Set `allowrelaxedtypes` annotation for every function (API) ([#85](https://github.com/hasura/ndc-open-api-lambda/pull/85)) 
+
 ## [[1.5.0](https://github.com/hasura/ndc-open-api-lambda/releases/tag/v1.5.0)] 2025-03-07
 
 - Update NDC NodeJS Lambda to `v1.11.0` [#80](https://github.com/hasura/ndc-open-api-lambda/pull/80)