Merge pull request #711 from polkadot-fellows/dependabot/npm_and_yarn/postcss-8.5.1

Author: dependabot[bot]

package.json

@@ -65,7 +65,7 @@
     "eslint-plugin-react-refresh": "^0.4.18",
     "gh-pages": "^6.3.0",
     "install": "0.13.0",
-    "postcss": "^8.4.49",
+    "postcss": "^8.5.1",
     "prettier": "3.4.2",
     "prettier-plugin-tailwindcss": "^0.6.9",
     "tailwindcss": "^3.4.17",