Merge pull request #751 from polkadot-fellows/dependabot/npm_and_yarn/postcss-8.5.3

Author: dependabot[bot]

package.json

@@ -65,7 +65,7 @@
     "eslint-plugin-react-refresh": "^0.4.19",
     "gh-pages": "^6.3.0",
     "install": "0.13.0",
-    "postcss": "^8.5.2",
+    "postcss": "^8.5.3",
     "prettier": "3.5.1",
     "prettier-plugin-tailwindcss": "^0.6.11",
     "tailwindcss": "^3.4.17",