Bump autoprefixer from 10.4.21 to 10.4.22

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.4.21 to 10.4.22.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.21...10.4.22)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-version: 10.4.22
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package.json

@@ -25,7 +25,7 @@
     "url": "https://github.com/textpattern/textpattern-default-theme/issues"
   },
   "devDependencies": {
-    "autoprefixer": "10.4.21",
+    "autoprefixer": "10.4.22",
     "clean-webpack-plugin": "4.0.0",
     "copy-webpack-plugin": "13.0.1",
     "cross-env": "10.1.0",