chore(deps-dev): bump postcss from 8.5.3 to 8.5.12

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.3 to 8.5.12.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.3...8.5.12)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.12
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -172,7 +172,7 @@
     "oauth2-server": "^2.4.1",
     "open": "^10.1.0",
     "open-cli": "=8.0.0",
-    "postcss": "^8.5.3",
+    "postcss": "^8.5.12",
     "postcss-loader": "^8.1.1",
     "postcss-preset-env": "^10.1.6",
     "postcss-scss": "^4.0.9",