Update CHANGELOG

Author: thejpster

CHANGELOG.md

@@ -2,7 +2,8 @@
 
 ## Unreleased Changes ([Source](https://github.com/neotron-compute/neotron-pico-bios/tree/master) | [Changes](https://github.com/neotron-compute/neotron-pico-bios/compare/v0.1.0...master))
 
-* Add RTT debugging
+* Add RTT debugging using defmt
+* Report git version over defmt
 * Describe how to flash/debug with a second Raspberry Pi Pico
 
 ## v0.1.0 ([Source](https://github.com/neotron-compute/neotron-pico-bios/tree/v0.1.0) | [Release](https://github.com/neotron-compute/neotron-pico-bios/release/tag/v0.1.0))