Migrate from `markdownlint-cli` to `markdownlint-cli2`

[sentenz]

The execution of the installation command npm install -g markdownlint-cli fails because the required node version is not supported by the development environment.

npm WARN EBADENGINE Unsupported engine {
npm WARN EBADENGINE   package: 'markdownlint-cli@0.33.0',
npm WARN EBADENGINE   required: { node: '>=14' },
npm WARN EBADENGINE   current: { node: 'v12.22.9', npm: '8.5.1' }
npm WARN EBADENGINE }
npm WARN EBADENGINE Unsupported engine {
npm WARN EBADENGINE   package: 'markdownlint@0.27.0',
npm WARN EBADENGINE   required: { node: '>=14.18.0' },
npm WARN EBADENGINE   current: { node: 'v12.22.9', npm: '8.5.1' }
npm WARN EBADENGINE }

[github-actions[bot]]

:tada: This issue has been resolved in version 2.1.1 :tada:

The release is available on:

• GitHub release
• v2.1.1

Your semantic-release bot :package::rocket: