Fix release version (#142)

Author: rikhil-s

CHANGELOG.md

@@ -5,7 +5,7 @@ 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-patch-1] - 2026-03-16
+## [5.0.0.post1] - 2026-03-16
 
 - Gracefully handle unknown message types
 

VERSION

@@ -1 +1 @@
-5.0.0-patch-1
+5.0.0.post1