Update remark to v8 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
remark-autolink-headings	^6.1.0 -> ^8.0.0
remark-highlight.js	^6 -> ^8.0.0

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Release Notes

remarkjs/remark-autolink-headings (remark-autolink-headings)

v8.0.0

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Deprecated 🪦

Full Changelog: remarkjs/remark-autolink-headings@7.0.1...8.0.0

v7.0.1

Compare Source

• 000ab47 Mark remark-autolink-headings as legacy
  please use rehype-autolink-headings instead

v7.0.0

Compare Source

• 42a3337 Use ESM

  // From CommonJS
  var remarkAutolinkHeadings = require('remark-autolink-headings')
  
  // To ESM
  import remarkAutolinkHeadings from 'remark-autolink-headings'

  Learn more about ESM in this guide
• 5d897b7 Add JSDoc based types
• 3222024 Remove support for deprecated behaviour

remarkjs/remark-highlight.js (remark-highlight.js)

v8.0.0

Compare Source

Deprecated 🪦

Full Changelog: remarkjs/remark-highlight.js@7.0.1...8.0.0

v7.0.1

Compare Source

• 5a7350a Mark remark-highlight.js as legacy
  please use rehype-highlight instead

v7.0.0

Compare Source

• 25c136d Use ESM

  // From CommonJS
  var remarkHighlightjs = require('remark-highlight.js')
  
  // To ESM
  import remarkHighlightjs from 'remark-highlight.js'

  Learn more about ESM in this guide
• 304336e Add JSDoc based types
• 389b817 7ad2c8c Update lowlight

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