Update CHANGELOG.md to describe math macro changes.

James Foster · James Foster · commit 893ba2b7eb55 · 2020-11-04T22:59:28.000-08:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 - Move repository from https://github.com/ianfixes/arduino_ci to https://github.com/Arduino-CI/arduino_ci
+- Revise math macros to avoid name clashes
 
 ### Deprecated
 
