Prepare CHANGELOG for version 0.27.0

Author: robinst

CHANGELOG.md

@@ -6,7 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 This project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
 with the exception that 0.x versions can break between minor versions.
 
-## Unreleased
+## [0.27.0] - 2025-10-12
 ### Added
 - Autolink extension: Now supports configuration of different link types that
   should be recognized and converted to links. See `AutolinkExtension#builder`
@@ -510,6 +510,7 @@ API breaking changes (caused by changes in spec):
 Initial release of commonmark-java, a port of commonmark.js with extensions
 for autolinking URLs, GitHub flavored strikethrough and tables.
 
+[0.27.0]: https://github.com/commonmark/commonmark-java/compare/commonmark-parent-0.26.0...commonmark-parent-0.27.0
 [0.26.0]: https://github.com/commonmark/commonmark-java/compare/commonmark-parent-0.25.1...commonmark-parent-0.26.0
 [0.25.1]: https://github.com/commonmark/commonmark-java/compare/commonmark-parent-0.25.0...commonmark-parent-0.25.1
 [0.25.0]: https://github.com/commonmark/commonmark-java/compare/commonmark-parent-0.24.0...commonmark-parent-0.25.0