chore: update changelog

Author: Priestch

packages/markopress/CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## [0.0.21] - 2026-05-17
+
+### 🐛 Bug Fixes
+
+- init highlighter with theme before preloading languages ([9aa3238](https://github.com/Priestch/markopress/commit/9aa3238))
+
+- fix custom theme ignored when preloadLanguages runs before getMarkdownIt ([9aa3238](https://github.com/Priestch/markopress/commit/9aa3238))
+
 ## [0.0.20] - 2026-05-17
 
 ### ✨ Features