Update changelog and version for multichannel. (#139)

* Update changelog and version for multichannel.

* bump to version 5.0.0

---------

Co-authored-by: James Walker <[email protected]>

Author: J-Jaywalker

CHANGELOG.md

@@ -5,6 +5,10 @@ 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).
 
+## [5.0.0] - 2025-08-14
+
+- Moved channel field to root of AddTranscript message for multichannel transcription.
+
 ## [4.0.9] - 2025-07-03
 
 - Deprecating `speechmatics-python` in favor of `speechmatics-rt` for real-time transcription and 'speechmatics-batch' for batch transcription.

VERSION

@@ -1 +1 @@
-4.0.9
+5.0.0