Bump rehype-highlight from 5.0.2 to 7.0.0

Bumps [rehype-highlight](https://github.com/rehypejs/rehype-highlight) from 5.0.2 to 7.0.0.
- [Release notes](https://github.com/rehypejs/rehype-highlight/releases)
- [Commits](rehypejs/rehype-highlight@5.0.2...7.0.0)

---
updated-dependencies:
- dependency-name: rehype-highlight
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]