Update changelog

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).
 
+## Unreleased
+
+### Changed
+
+- Changed the `auth` endpoint of the login with _Security Token_ from `GET` to `POST`
+- Changed the `auth` endpoint of the _Internet Identity_ login provider from `GET` to `POST`
+
 ## 1.250.0 - 2023-04-02
 
 ### Added