Update dependency tailwindcss to v4

Author: renovate[bot]

package.json

@@ -5,7 +5,7 @@
     "postcss": "^8.3.8",
     "postcss-cli": "^9.0.1",
     "postcss-elm-tailwind": "^0.11.0",
-    "tailwindcss": "^2.2.16"
+    "tailwindcss": "^4.0.0"
   },
   "scripts": {
     "copy-resources": "cp -r static/. dist/;",