fix(deps): update dependency postcss to v8.4.39

Author: renovate[bot]

package-lock.json

@@ -26,7 +26,7 @@
     "eslint-config-next": "14.0.3",
     "next": "14.0.3",
     "pino-pretty": "10.2.3",
-    "postcss": "8.4.31",
+    "postcss": "8.4.39",
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "react-hook-form": "7.48.2",