fix(deps): update dependency tailwindcss to v4

Author: renovate[bot]

package.json

@@ -26,7 +26,7 @@
     "reading-time": "1.5.0",
     "rollup": "3.29.5",
     "shiki": "0.14.7",
-    "tailwindcss": "3.4.17"
+    "tailwindcss": "4.1.9"
   },
   "devDependencies": {
     "@types/react": "18.3.18",