Bump autoprefixer from 10.4.20 to 10.4.21

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.20 to 10.4.21.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.20...10.4.21)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -12,7 +12,7 @@
     "@heroicons/react": "^2.2.0",
     "@tailwindcss/forms": "^0.5.7",
     "antd": "^5.22.4",
-    "autoprefixer": "10.4.20",
+    "autoprefixer": "10.4.21",
     "clsx": "^2.1.1",
     "d3": "^7.9.0",
     "https-proxy-agent": "^5.0.1",