Bump autoprefixer from 10.4.19 to 10.4.20

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.19 to 10.4.20.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.19...10.4.20)

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

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

package.json

@@ -10,7 +10,7 @@
  "@popperjs/core": "2.11.8"
  },
  "devDependencies": {
- "autoprefixer": "10.4.19",
+ "autoprefixer": "10.4.20",
  "cross-env": "7.0.3",
  "rtlcss": "4.1.1",
  "sass": "1.77.6",