Update CHANGELOG.md to prepare for 0.4.0 release (#167)

CHANGELOG.md

@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Added
+
+### Changed
+
+## [0.4.0] - 2024-05-03
+### Added
 - Added support for v4 client creation.
 - Added support for getting information about an AZ given a uuid.
 - Added support for getting a projection of attributes of entities using the 'groups' API endpoint.
@@ -23,6 +28,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Local environment provider now fetches port from `NUTANIX_PORT` environment variable
 - Add logic to internal.Client for auto retry once after refreshing auth cookie on a 401 response in case of session auth.
 
+### Removed
+- remove the unexported method from the v3 service interface enabling mocking
+
 ## [0.3.4] - 2022-11-24
 ### Changed
 - Bugfix: Stop explicit base64 decoding of BinaryData from ConfigMap in Kubernetes env provider