fix(deps): update dependency tailwindcss to v4

Author: renovate[bot]

package.json

@@ -26,7 +26,7 @@
     "astro": "5.2.5",
     "astro-compress": "^2.2.2",
     "astro-purgecss": "^5.0.0",
-    "tailwindcss": "^3.3.5"
+    "tailwindcss": "^4.0.0"
   },
   "devDependencies": {
     "@commitlint/cli": "^19.0.0",