build(deps-dev): bump autoprefixer in /apps/OpenSign

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.16 to 10.4.18.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/10.4.16...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>

apps/OpenSign/package.json

@@ -73,7 +73,7 @@
   },
   "devDependencies": {
     "@babel/runtime-corejs2": "^7.23.9",
-    "autoprefixer": "^10.4.16",
+    "autoprefixer": "^10.4.18",
     "commitizen": "^4.3.0",
     "eslint": "^8.51.0",
     "eslint-plugin-prettier": "^4.2.1",