chore(deps-dev): bump @11ty/eleventy-img from 3.1.1 to 3.1.8

Bumps [@11ty/eleventy-img](https://github.com/11ty/eleventy-img) from 3.1.1 to 3.1.8.
- [Release notes](https://github.com/11ty/eleventy-img/releases)
- [Commits](11ty/eleventy-img@v3.1.1...v3.1.8)

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

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

package.json

@@ -32,7 +32,7 @@
 	},
 	"devDependencies": {
 		"@11ty/eleventy": "^2.0.1",
-		"@11ty/eleventy-img": "^3.1.1",
+		"@11ty/eleventy-img": "^3.1.8",
 		"@11ty/eleventy-navigation": "^0.3.5",
 		"@11ty/eleventy-plugin-rss": "^1.2.0",
 		"@11ty/eleventy-plugin-syntaxhighlight": "^5.0.0",