chore(release): 2.3.0 [skip ci]

# [2.3.0](v2.2.1...v2.3.0) (2022-05-17)

### Bug Fixes

* **code-quality.md:** adapt MR review assignemt for a possible gitlab-ce workflow ([6ce2334f](6ce2334f)), closes [#74](#74)
* **code-quality.md:** sample workflow: step 5. belongs to 4 ([862766e5](862766e5))
* **code-quality.md:** spelling mistake and rephrasing ([f272bc64](f272bc64)), closes [#142](https://gitlab.gwdg.de/fe/technical-reference/issues/142)

### Features

* **code-quality.md:** add note about code quality measurement with gitlab-ci ([158d6ac4](158d6ac4)), closes [#74](#74)