Bump @11ty/eleventy-plugin-syntaxhighlight from 4.2.0 to 5.0.0

Bumps [@11ty/eleventy-plugin-syntaxhighlight](https://github.com/11ty/eleventy-plugin-syntaxhighlight) from 4.2.0 to 5.0.0.
- [Release notes](https://github.com/11ty/eleventy-plugin-syntaxhighlight/releases)
- [Commits](11ty/eleventy-plugin-syntaxhighlight@v4.2.0...v5.0.0)

---
updated-dependencies:
- dependency-name: "@11ty/eleventy-plugin-syntaxhighlight"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]