chore(deps): update dependency postcss to v8.5.23 [security]

Author: renovate[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "eslint": "9.39.5",
     "fastify": "5.9.0",
     "npm-run-all2": "8.0.4",
-    "postcss": "8.5.9",
+    "postcss": "8.5.23",
     "prettier": "3.9.6",
     "rimraf": "6.1.3",
     "rollup": "4.62.4",