fix: Update dependency @unhead/vue to v3

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
     "@nuxt/ui": "4.6.1",
     "@nuxtjs/google-fonts": "3.2.0",
     "@tresjs/nuxt": "5.6.0",
-    "@unhead/vue": "2.1.13",
+    "@unhead/vue": "3.0.1",
     "better-sqlite3": "12.8.0",
     "maath": "0.10.8",
     "nuxt": "4.4.2",