build: Bump version to 0.4.1 to fix broken 0.4.0 release on pub.dev

Author: krille-chan

flutter/pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_vodozemac
 description: "Flutter bindings for the Rust Vodozemac library"
-version: 0.4.0
+version: 0.4.1
 homepage: https://famedly.com
 repository: https://github.com/famedly/dart-vodozemac
 issue_tracker: https://github.com/famedly/dart-vodozemac/issues