fix(deps): update dependency postcss to v8.4.31

Author: renovate[bot]

package.json

@@ -13,7 +13,7 @@
     "@types/node": "20.9.0",
     "autoprefixer": "10.4.14",
     "eclint": "2.8.1",
-    "postcss": "8.4.27",
+    "postcss": "8.4.31",
     "prettier": "3.1.0",
     "react": "18.2.0",
     "react-scripts": "5.0.1",