chore(release): 2.1.0 [skip ci]

# [2.1.0](https://gitlab.com/to-be-continuous/mkdocs/compare/2.0.1...2.1.0) (2023-03-21)

### Features

* **link-checker:** add links checker with lychee ([35fba5d2](https://gitlab.com/to-be-continuous/mkdocs/commit/35fba5d23168dee215762e09536ea1453b85c27c))