Write up changelog for 0.5.0

Author: deimonn

CHANGELOG.md

@@ -4,6 +4,18 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.0](https://github.com/deimonn/code-re2c/compare/v0.4.0...v0.5.0) - 2026-02-13
+
+### Added
+
+- Added highlighting for the `$` and `:=` symbols
+- Added highlighting for actions
+
+### Changed
+
+- New icon and logo designs
+- Shortened the extension's package description
+
 ## [0.4.0](https://github.com/deimonn/code-re2c/compare/v0.3.0...v0.4.0) - 2025-04-23
 
 ### Added