Bump autoprefixer from 10.4.17 to 10.4.18 in /app

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.17 to 10.4.18.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.17...10.4.18)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

app/package.json

@@ -17,7 +17,7 @@
     "@typescript-eslint/eslint-plugin": "^7.0.0",
     "@typescript-eslint/parser": "^6.20.0",
     "@vue/eslint-config-standard": "^8.0.1",
-    "autoprefixer": "^10.4.17",
+    "autoprefixer": "^10.4.18",
     "eslint": "^8.57.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-nuxt": "^4.0.0",