Bump @unhead/addons from 1.7.4 to 1.8.1 (#9)

Bumps [@unhead/addons](https://github.com/unjs/unhead/tree/HEAD/packages/ssr) from 1.7.4 to 1.8.1.
- [Release notes](https://github.com/unjs/unhead/releases)
- [Commits](https://github.com/unjs/unhead/commits/v1.8.1/packages/ssr)

---
updated-dependencies:
- dependency-name: "@unhead/addons"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -20,7 +20,7 @@
   "devDependencies": {
     "@fullhuman/postcss-purgecss": "^5.0.0",
     "@types/node": "^18.18.7",
-    "@unhead/addons": "^1.7.4",
+    "@unhead/addons": "^1.8.1",
     "@vitejs/plugin-vue": "^4.4.0",
     "@vue/eslint-config-typescript": "^12.0.0",
     "autoprefixer": "^10.4.16",