fix(deps): [security] bump highlight.js from 9.18.0 to 9.18.5

Bumps [highlight.js](https://github.com/highlightjs/highlight.js) from 9.18.0 to 9.18.5. **This update includes a security fix.**
- [Release notes](https://github.com/highlightjs/highlight.js/releases)
- [Changelog](https://github.com/highlightjs/highlight.js/blob/9.18.5/CHANGES.md)
- [Commits](highlightjs/highlight.js@9.18.0...9.18.5)

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