fix(deps): update dependency date-fns to v4

Author: renovate[bot]

package-lock.json

@@ -33,7 +33,7 @@
     "@types/react": "19.1.8",
     "@types/react-dom": "19.1.6",
     "accept-language": "^3.0.20",
-    "date-fns": "^3.6.0",
+    "date-fns": "^4.0.0",
     "dotenv": "^16.5.0",
     "eslint": "8.57.1",
     "eslint-config-next": "15.4.2",