Update dependency markdownlint-cli2 to ^0.18.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
markdownlint-cli2	^0.3.2 -> ^0.18.0

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Release Notes

DavidAnson/markdownlint-cli2 (markdownlint-cli2)

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)

v0.12.1

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• Update JSONC parsing to handle trailing commas
• Add documentation links to JSON schema
• Update dependencies

v0.12.0

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• Remove deprecated markdownlint-cli2-config entry point
  • Use markdownlint-cli2 --config ... instead
• Remove deprecated markdownlint-cli2-fix entry point
  • Use markdownlint-cli2 --fix ... instead
• Add --help and --no-globs parameters
• Improve and document included JSON schemas
• Update dependencies (including markdownlint)

v0.11.0

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• Add modulePaths configuration option
• Update dependencies (including markdownlint)
• Remove support for end-of-life Node 16

v0.10.0

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• Add showFound configuration option
• Add .markdownlint-cli2.jsonc config schema
• Update dependencies (including markdownlint)

v0.9.2

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• Remove npm-shrinkwrap.json entirely to avoid npm failures

v0.9.1

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• Remove devDependencies from npm-shrinkwrap.json to avoid npm failures

v0.9.0

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• Add support for Node.js's package.json as a configuration file source
• Add output formatter for Static Analysis Results Interchange Format/SARIF
• Bundle npm-shrinkwrap.json for reproducible/faster installs
• Update dependencies (including markdownlint)

v0.8.1

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• Handle --config edge case

v0.8.0

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• Add support for --config and --fix parameters
• Update dependencies (including markdownlint)
• Remove support for end-of-life Node 14

v0.7.1

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• Update dependencies (including markdownlint)

v0.7.0

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• Add support for extends in config property of .markdownlint-cli2.* files
• Build and publish davidanson/markdownlint-cli2-rules Docker container image
• Update dependencies (including markdownlint)

v0.6.0

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• Update dependencies (including markdownlint)

v0.5.1

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• Update dependencies

v0.5.0

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• New rules
• Support modules (MJS) everywhere
• Include dotfiles

v0.4.0

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• New rules
• Async custom rules
• Explicit config
• CJS (breaking)

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