chore(deps): update dependency rehype-highlight to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rehype-highlight	^4.1.0 -> ^6.0.0

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Release Notes

rehypejs/rehype-highlight (rehype-highlight)

v6.0.0

Compare Source

• 2c5a4ec Remove detection by default
  breaking: see commit message for migration
• 9c42989 Fix to throw error on file

v5.0.2

Compare Source

• 0e5d013 Add improved docs
  by @​wooorm in https://github.com/rehypejs/rehype-highlight/pull/22

Full Changelog: rehypejs/rehype-highlight@5.0.1...5.0.2

v5.0.1

Compare Source

• ea591fc Fix types

Full Changelog: rehypejs/rehype-highlight@5.0.0...5.0.1

v5.0.0

Compare Source

• dfa5a4b Use ESM

  • Change:

    // From CommonJS
    var rehypeHighlight = require('rehype-highlight')
    
    // To ESM
    import rehypeHighlight from 'rehype-highlight'

    Learn more about ESM in this guide

• c87da55 Update lowlight
  • This changes from having all languages registered by default (191) to only having common languages on (35). See https://github.com/wooorm/lowlight#syntaxes for which languages are on by default and which can be added.
    This makes rehype-highlight much faster and viable for use in browsers
  • This removes the light version of the plugin, because the default is now light
  • Updating lowlight also updates highlight.js to v11, which improves results
• fa5fcf4 Add JSDoc based types
• 84b5ce2 Fix code being dropped

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[gilest]

The change to ESM breaks the website build

[renovate]

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