added changelog message

Author: midasgossye

Diff for: CHANGELOG.md

@@ -15,7 +15,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Added a CI workflow to lint the code base
 - Added a CI workflow to check for spelling errors
 - Extraction of byes usage in a compiled sketch is now calculated in a method: `ArduinoBackend.last_bytes_usage`
-
+- Added ```nano_every``` platform to represent ```arduino:megaavr``` architecture
 ### Changed
 - We now compile a shared library to be used for each test.
 - Put build artifacts in a separate directory to reduce clutter.