fix(deps): update dependency rehype-document to v7

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rehype-document	^6.1.0 -> ^7.0.0

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Release Notes

rehypejs/rehype-document (rehype-document)

v7.0.3

Compare Source

• 515c86c Fix typo in types

Full Changelog: rehypejs/rehype-document@7.0.2...7.0.3

v7.0.2

Compare Source

• 41182b9 Fix typo

Full Changelog: rehypejs/rehype-document@7.0.1...7.0.2

v7.0.1

Compare Source

• b3b7d85 Fix declaration merging

Full Changelog: rehypejs/rehype-document@7.0.0...7.0.1

v7.0.0

Compare Source

Change

• 2423ac6 Update @types/hast, unified, utilities, etc
  migrate: update too
• 7424740 Change to require Node.js 16
  migrate: update too
• 1a90d10 Change to use exports
  migrate: don’t use private APIs

Add

• 72dfb02 Add support for title from frontmatter, metadata

Full Changelog: rehypejs/rehype-document@6.1.0...7.0.0

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