chore(deps): update dependency markdownlint to ^0.39.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
markdownlint	^0.38.0 -> ^0.39.0

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Release Notes

DavidAnson/markdownlint (markdownlint)

v0.39.0

Compare Source

• Add MD060/table-column-style
• Improve MD001/MD007/MD009/MD010/MD029/MD033/MD037/MD059
• Add support for reporting violations as severity warning
• Deprecate resultVersion and toString (breaking change)
• Improve type definitions
• Improve demo web page
• Update dependencies

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