Bump postcss-load-config from 4.0.2 to 6.0.1

Bumps [postcss-load-config](https://github.com/postcss/postcss-load-config) from 4.0.2 to 6.0.1.
- [Release notes](https://github.com/postcss/postcss-load-config/releases)
- [Changelog](https://github.com/postcss/postcss-load-config/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss-load-config/compare/v4.0.2...6.0.1)

---
updated-dependencies:
- dependency-name: postcss-load-config
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -88,7 +88,7 @@
     "pirates": "^4.0.6",
     "postcss-import": "^15.1.0",
     "postcss-js": "^4.0.1",
-    "postcss-load-config": "^4.0.2",
+    "postcss-load-config": "^6.0.1",
     "postcss-nested": "^7.0.2",
     "postcss-selector-parser": "^6.1.2",
     "postcss-value-parser": "^4.2.0",