chore(deps): bump highlight.js and hexo

Bumps [highlight.js](https://github.com/highlightjs/highlight.js) and [hexo](https://github.com/hexojs/hexo). These dependencies needed to be updated together.

Updates `highlight.js` from 9.18.5 to 11.6.0
- [Release notes](https://github.com/highlightjs/highlight.js/releases)
- [Changelog](https://github.com/highlightjs/highlight.js/blob/main/CHANGES.md)
- [Commits](highlightjs/highlight.js@9.18.5...11.6.0)

Updates `hexo` from 4.2.1 to 6.2.0
- [Release notes](https://github.com/hexojs/hexo/releases)
- [Commits](hexojs/hexo@4.2.1...6.2.0)

---
updated-dependencies:
- dependency-name: highlight.js
  dependency-type: indirect
- dependency-name: hexo
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]