fix(deps): update dependency postcss-load-config to v5

Author: renovate[bot]

package.json

@@ -73,7 +73,7 @@
     "esutils": "^2.0.3",
     "known-css-properties": "^0.29.0",
     "postcss": "^8.4.5",
-    "postcss-load-config": "^3.1.4",
+    "postcss-load-config": "^5.0.0",
     "postcss-safe-parser": "^6.0.0",
     "postcss-selector-parser": "^6.0.11",
     "semver": "^7.5.3",