docs: update CHANGELOG.md for 0.4.1 (#58)

Co-authored-by: jorben <2806170+jorben@users.noreply.github.com>

Author: jorben

CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.1] - 2026-03-04
+### :sparkles: New Features
+- [`81d7911`](https://github.com/MarkPDFdown/markpdfdown-desktop/commit/81d79115ad415cc8589c2cc0c00bfd56fbb2d2d6) - **cloud**: ✨ add checkout integration and payment callback flow *(PR [#55](https://github.com/MarkPDFdown/markpdfdown-desktop/pull/55) by [@jorben](https://github.com/jorben))*
+
+### :wrench: Chores
+- [`b89cd75`](https://github.com/MarkPDFdown/markpdfdown-desktop/commit/b89cd752967f6f18ebcd658bd0258dbbb5882184) - **coverage**: 🔧 improve coverage tooling and test suite *(PR [#57](https://github.com/MarkPDFdown/markpdfdown-desktop/pull/57) by [@jorben](https://github.com/jorben))*
+
+
 ## [0.3.3] - 2026-03-02
 ### :bug: Bug Fixes
 - [`f3389c2`](https://github.com/MarkPDFdown/markpdfdown-desktop/commit/f3389c2c904397910630b6e2c898787d1b359a47) - **upload**: 🐛 prevent action bar overlap on long file lists *(PR [#53](https://github.com/MarkPDFdown/markpdfdown-desktop/pull/53) by [@jorben](https://github.com/jorben))*
@@ -154,3 +162,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [0.3.1]: https://github.com/MarkPDFdown/markpdfdown-desktop/compare/0.2.2...0.3.1
 [0.3.3]: https://github.com/MarkPDFdown/markpdfdown-desktop/compare/0.3.2...0.3.3
 [0.3.2]: https://github.com/MarkPDFdown/markpdfdown-desktop/compare/0.3.1...0.3.2
+[0.4.1]: https://github.com/MarkPDFdown/markpdfdown-desktop/compare/0.3.3...0.4.1