Bump @11ty/eleventy-img from 5.0.0 to 6.0.0

Bumps [@11ty/eleventy-img](https://github.com/11ty/eleventy-img) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/11ty/eleventy-img/releases)
- [Commits](11ty/eleventy-img@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: "@11ty/eleventy-img"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]