chore(deps): bump rehype-pretty-code from 0.12.3 to 0.12.6 (#741)

Bumps [rehype-pretty-code](https://github.com/atomiks/rehype-pretty-code) from 0.12.3 to 0.12.6.
- [Release notes](https://github.com/atomiks/rehype-pretty-code/releases)
- [Commits](https://github.com/atomiks/rehype-pretty-code/compare/v0.12.3...v0.12.6)

---
updated-dependencies:
- dependency-name: rehype-pretty-code
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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