fix(deps): update dependency postcss to v8.5.6 (#1566)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

apps/getting-started-nextjs/package-lock.json

@@ -17,7 +17,7 @@
     "eslint": "8.57.1",
     "eslint-config-next": "14.2.28",
     "next": "14.2.30",
-    "postcss": "8.5.3",
+    "postcss": "8.5.6",
     "react": "18.3.1",
     "react-dom": "18.3.1",
     "tailwindcss": "3.4.17",