docs: add macOS brokered auth to CHANGELOG

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: dggsax

CHANGELOG.md

@@ -5,6 +5,12 @@ 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]
+### Added
+- Added support for macOS brokered authentication via Enterprise SSO Extension (opt-in with `--mode broker`)
+
+### Changed
+- Upgrade MSAL from `4.65.0` to `4.83.1`
+- Added `Microsoft.Identity.Client.NativeInterop` v0.20.3
 
 ## [0.9.5] - 2026-02-24
 ### Added