Bump autoprefixer from 9.8.2 to 9.8.4 (#31168)

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.8.2 to 9.8.4.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/master/CHANGELOG.md)
- [Commits](postcss/autoprefixer@9.8.2...9.8.4)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: XhmikosR <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -99,7 +99,7 @@
     "@rollup/plugin-babel": "^5.0.4",
     "@rollup/plugin-commonjs": "^13.0.0",
     "@rollup/plugin-node-resolve": "^7.1.3",
-    "autoprefixer": "^9.8.2",
+    "autoprefixer": "^9.8.4",
     "bundlewatch": "^0.2.7",
     "clean-css-cli": "^4.3.0",
     "cross-env": "^7.0.2",