chore(deps): update dependency markdownlint-cli2 to v0.18.1

[renovate]

This PR contains the following updates:

Package	Update	Change
markdownlint-cli2	minor	0.12.1 -> 0.18.1

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Release Notes

DavidAnson/markdownlint-cli2 (markdownlint-cli2)

v0.18.1

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• Update dependencies (including markdownlint)

v0.18.0

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• Use user ID in Docker containers for security
• Update dependencies (including markdownlint)
• Remove support for end-of-life Node 18

v0.17.2

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• Update dependencies (including markdownlint)

v0.17.1

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• Update dependencies (including markdownlint)

v0.17.0

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• Convert to ECMAScript modules
• Use import() when loading modules
• Update dependencies (including markdownlint)

v0.16.0

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• Try not to use require for modules (due to Node 22.12)
• Update dependencies (EXcluding markdownlint)

v0.15.0

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• Add support for stdin input via - glob
• Add output formatter based on string templates
• Update dependencies (including markdownlint)

v0.14.0

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• Handle -- parameter per POSIX convention
• Add support for glob to gitignore configuration
• Update dependencies (including markdownlint)

v0.13.0

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• Add noBanner and gitignore configuration options
• Reduce install size by switching to js-yaml package
• Add more detail to some error messages
• Export JSONC/YAML parsers for reuse
• Update dependencies (including markdownlint)

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