chore(deps-dev): bump autoprefixer from 10.4.5 to 10.4.21 (#6)

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.5 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@10.4.5...10.4.21)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-version: 10.4.21
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Daniel Leroux <daniel.leroux@siemens.com>

Author: dependabot[bot]

package.json

@@ -46,7 +46,7 @@
     "@types/rimraf": "^4.0.5",
     "@types/tar": "^6.1.13",
     "adm-zip": "^0.5.16",
-    "autoprefixer": "10.4.5",
+    "autoprefixer": "10.4.21",
     "axios": "^1.5.0",
     "clsx": "^2.1.0",
     "docusaurus-plugin-sass": "^0.2.5",