chore(deps-dev): bump postcss-cli from 10.1.0 to 11.0.0 (#75)

Bumps [postcss-cli](https://github.com/postcss/postcss-cli) from 10.1.0 to 11.0.0.
- [Release notes](https://github.com/postcss/postcss-cli/releases)
- [Changelog](https://github.com/postcss/postcss-cli/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-cli@10.1.0...11.0.0)

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

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

package.json

@@ -12,7 +12,7 @@
     "gh-release": "^7.0.0",
     "node-sass": "^9.0.0",
     "npm-run-all": "^4.1.5",
-    "postcss-cli": "^10.0.0",
+    "postcss-cli": "^11.0.0",
     "serve": "^14.1.2",
     "sitedown": "^5.0.1",
     "stylelint": "^14.16.0",