ravedude: Update CHANGELOG

Author: Rahix

ravedude/CHANGELOG.md

@@ -5,6 +5,28 @@ 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).
 
 ## [Unreleased]
+### Changed
+- **BREAKING** ravedude is now configured using a `Ravedude.toml` configuration
+  file.  This is more flexible because boards are no longer hard-coded into the
+  internals of the tool.  Custom boards can now be defined and settings for
+  off-the-shelf boards can be adjusted.
+
+  For documentation, please check [`main.rs`](https://github.com/Rahix/avr-hal/blob/main/ravedude/src/main.rs)
+  for the time being.
+
+  This redesign was implemented in [#522].
+- Updated to clap 3.0 ([#631]).
+
+### Added
+- Added support for the Mighty Core ATMEGA1284P board ([#607]).
+
+### Fixed
+- Fixed trinked board definition ([#626]).
+
+[#522]: https://github.com/Rahix/avr-hal/pull/522
+[#607]: https://github.com/Rahix/avr-hal/pull/607
+[#626]: https://github.com/Rahix/avr-hal/pull/626
+[#631]: https://github.com/Rahix/avr-hal/pull/631
 
 
 ## [0.1.8] - 2024-03-15