update the CHANGELOG

Author: Jorge Aparicio

CHANGELOG.md

@@ -7,10 +7,18 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
-## [v0.1.0] - 2016-10-15
+### Fixed
+
+- Some SVD files specify that two registers exist at the same address.
+  `svd2rust` didn't handle this case and panicked. A proper solution to handle
+  this case will require `union`s but those have not been stabilized. For now,
+  `svd2rust` will simply pick one of the two or more registers that overlap and
+  ignore the rest.
+
+## v0.1.0 - 2016-10-15
 
 ### Added
 
 - Initial version of the `svd2rust` tool
 
-[Unreleased]: https://github.com/japaric/f3/compare/v0.1.0...HEAD
+[Unreleased]: https://github.com/japaric/svd2rust/compare/v0.1.0...HEAD