Bump autoprefixer from 9.8.8 to 10.4.8

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.8.8 to 10.4.8.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@9.8.8...10.4.8)

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

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

package.json

@@ -17,7 +17,7 @@
   },
   "homepage": "https://github.com/google/docsy-example#readme",
   "devDependencies": {
-    "autoprefixer": "^9.8.6",
+    "autoprefixer": "^10.4.8",
     "postcss": "^8.3.7",
     "postcss-cli": "^8.3.1"
   }