Fix missing entries in CHANGELOG.md

CHANGELOG.md

@@ -11,8 +11,8 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ### Added
 
-- Handling of missing data in utility functions
-- Add Theil2
+- ![STAT] Handling of missing data in utility functions
+- ![STAT] Add Theil2
 
 ## [1.0.0] - 2023-06-15
 
@@ -22,3 +22,8 @@ This is the **initial release** of revisions extensions for JDemetra+ v3.
 [Unreleased]: https://github.com/jdemetra/jdplus-revisions/compare/v1.1.0...HEAD
 [1.1.0]: https://github.com/jdemetra/jdplus-revisions/compare/v1.0.0...v1.1.0
 [1.0.0]: https://github.com/jdemetra/jdplus-revisions/releases/tag/v1.0.0
+
+[STAT]: https://img.shields.io/badge/-STAT-068C09
+[OTHER]: https://img.shields.io/badge/-OTHER-e4e669
+[IO]: https://img.shields.io/badge/-IO-F813F7
+[UI]: https://img.shields.io/badge/-UI-5319E7