chore(deps-dev): bump @11ty/eleventy from 3.0.0-alpha.7 to 3.0.0-alpha.9

Bumps [@11ty/eleventy](https://github.com/11ty/eleventy) from 3.0.0-alpha.7 to 3.0.0-alpha.9.
- [Release notes](https://github.com/11ty/eleventy/releases)
- [Changelog](https://github.com/11ty/eleventy/blob/main/docs/release-instructions.md)
- [Commits](https://github.com/11ty/eleventy/compare/v3.0.0-alpha.7...v3.0.0-alpha.9)

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

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

package.json

@@ -29,7 +29,7 @@
     "youtube-video-element": "^1.0.0"
   },
   "devDependencies": {
-    "@11ty/eleventy": "3.0.0-alpha.7",
+    "@11ty/eleventy": "3.0.0-alpha.9",
     "@11ty/eleventy-activity-feed": "^1.0.9",
     "@11ty/eleventy-fetch": "^4.0.1",
     "@11ty/eleventy-img": "^4.0.2",