chore: generate changelog

Author: kazupon

CHANGELOG.md

@@ -1,3 +1,17 @@
+# v0.28.0 (2026-02-08T09:30:45Z)
+
+This changelog is generated by [GitHub Releases](https://github.com/kazupon/gunshi/releases/tag/v0.28.0)
+
+<!-- Release notes generated using configuration in .github/release.yml at v0.28.0 -->
+
+## What's Changed
+
+### 🌟 Features
+
+- feat: support nested sub command by @kazupon in https://github.com/kazupon/gunshi/pull/494
+
+**Full Changelog**: https://github.com/kazupon/gunshi/compare/v0.27.6...v0.28.0
+
 # v0.27.6 (2026-02-02T10:43:55Z)
 
 This changelog is generated by [GitHub Releases](https://github.com/kazupon/gunshi/releases/tag/v0.27.6)