Bump highlight.js and lerna-changelog

Bumps [highlight.js](https://github.com/highlightjs/highlight.js) to 10.7.3 and updates ancestor dependency [lerna-changelog](https://github.com/lerna/lerna-changelog). These dependencies need to be updated together.


Updates `highlight.js` from 9.18.5 to 10.7.3
- [Release notes](https://github.com/highlightjs/highlight.js/releases)
- [Changelog](https://github.com/highlightjs/highlight.js/blob/10.7.3/CHANGES.md)
- [Commits](highlightjs/highlight.js@9.18.5...10.7.3)

Updates `lerna-changelog` from 0.8.3 to 2.2.0
- [Release notes](https://github.com/lerna/lerna-changelog/releases)
- [Changelog](https://github.com/lerna/lerna-changelog/blob/master/CHANGELOG.md)
- [Commits](lerna/lerna-changelog@v0.8.3...v2.2.0)

---
updated-dependencies:
- dependency-name: highlight.js
  dependency-type: indirect
- dependency-name: lerna-changelog
  dependency-type: direct:development
...

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