Bump nosborn/github-action-markdown-cli from 2 to 3.0.0

[dependabot[bot]]

Bumps nosborn/github-action-markdown-cli from 2 to 3.0.0.

Release notes

Sourced from nosborn/github-action-markdown-cli's releases.

v3.0.0

What's Changed

• Bump markdownlint CLI to 0.30.0 by @​nosborn in nosborn/github-action-markdown-cli#23
• Expose --ignore-path option by @​nosborn in nosborn/github-action-markdown-cli#25
• Use a problem matcher by @​nosborn in nosborn/github-action-markdown-cli#24

Full Changelog: https://github.com/nosborn/github-action-markdown-cli/compare/v2...v3.0.0

Commits

• 6e8c18c Bump to v3.0.0
• 7b698a3 Use a problem matcher
• b5f9765 Document --ignore-path option
• 3b7c8d5 Expose --ignore-path option
• 4af041e Bump markdownlint-cli to 0.30.0
• 23f7dd2 Add .dockerignore
• 569c5b2 Bump actions/setup-python from 2.2.2 to 2.3.1
• 449cde1 Bump actions/checkout from 2.3.5 to 2.4.0
• 823add8 Bump actions/checkout from 2.3.4 to 2.3.5
• 302bba3 Use softprops/action-gh-release
• Additional commits viewable in compare view

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[jonasbn]

Breaks the build see issue nosborn/github-action-markdown-cli/issues/26

[dependabot[bot]]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.