message: Add version link
diff: @@ -7,7 +7,7 @@ All notable changes to this project will be documented in this file.
  The format is based on [Keep a Changelog](https://keepachangelog.com/),
  and this project adheres to [Semantic Versioning](https://semver.org/).
  -## Unreleased
  +## [Unreleased]
  ### Fixed
  - Updated `postcss`.
  