Fix typo in changelog

CHANGELOG.md

@@ -14,7 +14,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 More than 8 years after the first commit and almost 5 years after the 0.99.0
 release, `derive_more` has finally reached its 1.0.0 release. This release
 contains a lot of changes (including some breaking ones) to make it easier to
-use the derives and make it possible to extend them without having to breaking
+use the derives and make it possible to extend them without having to break
 backwards compatibility again. There are five major changes that I would like
 to call out, but there are many more changes that are documented below:
 1. There is a new `Debug` derive that can be used to easily customize `Debug`