fix(deps): update dependency mdast-util-mdx to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mdast-util-mdx	^2.0.1 -> ^3.0.0

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Release Notes

syntax-tree/mdast-util-mdx (mdast-util-mdx)

v3.0.0

Compare Source

Change

• 52c774b Update @types/mdast, mdast utilities
  migrate: update too
• a98fd61 Change to require Node.js 16
  migrate: update too
• 1b57e3d Change to use exports
  migrate: don’t use private APIs

Full Changelog: syntax-tree/mdast-util-mdx@2.0.1...3.0.0

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