chore: Update changelog

Author: rnishtala-sumo

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [v3.9.0] - 2023-05-22
+
+- chore: update Terraform to 1.5.1 [#70]
+
+[v3.9.0]: https://github.com/SumoLogic/sumologic-kubernetes-setup/releases/v3.9.0
+[#70]: https://github.com/SumoLogic/sumologic-kubernetes-setup/pull/70
+
 ## [v3.8.0] - 2023-04-20
 
 - chore: update Terraform to 1.4.5 [#62]