Add file CHANGELOG.md #4

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is inspired from [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and the versioning aim to respect [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+Here is a template for new release sections:
+```
+## [0.0.0] - Release - Name of Release - 20YY-MM-DD
+
+### Added
+- [#](https://github.com/rl-institut/super-repo/pull/)
+### Changed
+- [#](https://github.com/rl-institut/super-repo/pull/)
+### Removed
+- [#](https://github.com/rl-institut/super-repo/pull/)
+```
+
+
+## Current
+
+### Added
+- [LICENSE](https://github.com/rl-institut/super-repo/blob/main/LICENSE)
+- CITATION.cff [#2](https://github.com/rl-institut/super-repo/pull/2)
+- CONTRIBUTING.md [#2](https://github.com/rl-institut/super-repo/pull/2)
+- USERS.cff [#2](https://github.com/rl-institut/super-repo/pull/2)
+- CODE_OF_CONDUCT.md [#3](https://github.com/rl-institut/super-repo/pull/3)
+- CHANGELOG.md [#3](https://github.com/rl-institut/super-repo/pull/3)
+
+
+## [0.0.1] Initial Release - Hello Super-Repo - 2022-03-03
+
+### Added