chore: release 4.0.1

[github-actions[bot]]

:robot: I have created a release beep boop

4.0.1 (2024-03-06)

Chores

• update changelog with note that v4.0.0 was not published to npm (#241) (e80139d)

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[github-actions[bot]]

:robot: Release is at https://github.com/eslint/eslint-plugin-markdown/releases/tag/v4.0.1 :sunflower: