chore(deps): update peerdependency @unhead/vue to ^2.0.8

Author: renovate[bot]

package.json

@@ -60,7 +60,7 @@
     "test:chrome": "HAS_CHROME=true vitest"
   },
   "peerDependencies": {
-    "@unhead/vue": "^2.0.5",
+    "@unhead/vue": "^2.0.8",
     "unstorage": "^1.15.0"
   },
   "dependencies": {