docs: Update CHANGELOG.md to include hashbang support for scripts

Author: schollm

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Upcoming]
+### Added
+- Hashbang (#!) support for script to enable direct execution on Unix-like systems.
 
 ## [1.3.2] - 2026-04-09
 ### Added