deps(deps): bump tailwindcss in the production-dependencies group

Bumps the production-dependencies group with 1 update: [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss).


Updates `tailwindcss` from 3.4.17 to 4.0.0
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/next/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.0.0/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

packages/eleventy-config/package.json

@@ -61,7 +61,7 @@
     "postcss-preset-env": "^10.1.3",
     "postcss-variable-compress": "^3.0.0",
     "postcss-viewport-unit-fallback": "^1.0.1",
-    "tailwindcss": "^3.4.17",
+    "tailwindcss": "^4.0.0",
     "workbox-build": "^7.3.0"
   },
   "devDependencies": {