Update CHANGELOG.md

Author: driesvints

CHANGELOG.md

@@ -1,6 +1,12 @@
 # Release Notes
 
-## [Unreleased](https://github.com/laravel/ui/compare/v3.3.3...3.x)
+## [Unreleased](https://github.com/laravel/ui/compare/v3.4.0...3.x)
+
+
+## [v3.4.0 (2021-11-30)](https://github.com/laravel/ui/compare/v3.3.3...v3.4.0)
+
+### Changed
+- Update library to Boostrap 5 ([#212](https://github.com/laravel/ui/pull/212))
 
 
 ## [v3.3.3 (2021-11-21)](https://github.com/laravel/ui/compare/v3.3.2...v3.3.3)