chore(deps-dev): bump postcss-loader from 7.3.3 to 8.0.0 (#9506)

Bumps [postcss-loader](https://github.com/webpack-contrib/postcss-loader) from 7.3.3 to 8.0.0.
- [Release notes](https://github.com/webpack-contrib/postcss-loader/releases)
- [Changelog](https://github.com/webpack-contrib/postcss-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/postcss-loader/compare/v7.3.3...v8.0.0)

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

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

package.json

@@ -172,7 +172,7 @@
     "oauth2-server": "^2.4.1",
     "open": "^10.0.3",
     "postcss": "^8.4.33",
-    "postcss-loader": "^7.3.0",
+    "postcss-loader": "^8.0.0",
     "postcss-preset-env": "^9.3.0",
     "prettier": "^3.2.4",
     "process": "^0.11.10",