Reformat Changelog

Author: stlehmann

CHANGELOG.md

@@ -6,8 +6,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## 3.5.1 (Unreleased)
 
-- {+ Added: +} [#462](https://github.com/stlehmann/pyads/issues/462) Short description on Linux build dependencies in docs
-- CHANGED: [#400](https://github.com/stlehmann/pyads/issues/400) Full support for pyproject.toml
+### Added
+* [#462](https://github.com/stlehmann/pyads/issues/462) Short description on Linux build dependencies in docs
+
+### Changed
+* [#400](https://github.com/stlehmann/pyads/issues/400) Full support for pyproject.toml
 
 ## 3.5.0