⬆️ upgrade tailwindcss to v4

Author: renovate[bot]

package.json

@@ -46,7 +46,7 @@
     "eslint-config-antoine": "^1.0.14",
     "eslint-config-next": "15.1.4",
     "postcss": "^8.5.1",
-    "tailwindcss": "^3.4.17",
+    "tailwindcss": "^4.0.0",
     "typescript": "^5"
   },
   "packageManager": "yarn@1.22.22+sha1.ac34549e6aa8e7ead463a7407e1c7390f61a6610"