Bump @11ty/eleventy-img from 4.0.2 to 6.0.4

Bumps [@11ty/eleventy-img](https://github.com/11ty/eleventy-img) from 4.0.2 to 6.0.4.
- [Release notes](https://github.com/11ty/eleventy-img/releases)
- [Commits](11ty/image@v4.0.2...v6.0.4)

---
updated-dependencies:
- dependency-name: "@11ty/eleventy-img"
  dependency-version: 6.0.4
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]