[doc] format CHANGELOG for auto update

CHANGELOG.md

@@ -4,7 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+<!-- next-header -->
+
+## [Unreleased] - ReleaseDate
+
+### Changed
+
+- DEWIF: read_dewif_file_content() now directly returns an Iterator.
 
 ## [0.9.1] - 2020-01-19
 
@@ -25,3 +31,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [0.8.0] - 2020-01-16
 
 Initial version.
+
+<!-- next-url -->
+[Unreleased]: https://git.duniter.org/libs/dup-crypto-rs/compare/v0.9.1...HEAD
+[0.9.1]: https://git.duniter.org/libs/dup-crypto-rs/compare/v0.8.0...v0.9.1