Update changelog

Author: daun

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
-<!-- ## [Unreleased] -->
+## [0.4.0] - 2024-02-15
+
+- Improve performance by reusing parsed document throughout visit
 
 ## [0.3.1] - 2024-01-27
 
@@ -38,6 +40,7 @@
 
 - Initial release
 
+[0.4.0]: https://github.com/swup/parallel-plugin/releases/tag/0.4.0
 [0.3.1]: https://github.com/swup/parallel-plugin/releases/tag/0.3.1
 [0.3.0]: https://github.com/swup/parallel-plugin/releases/tag/0.3.0
 [0.2.0]: https://github.com/swup/parallel-plugin/releases/tag/0.2.0