chore(deps): update dependency postcss to v8.4.49

Author: renovate[bot]

packages/website/package.json

@@ -23,7 +23,7 @@
     "next-themes": "0.4.3",
     "nextra": "3.2.3",
     "nextra-theme-docs": "3.2.3",
-    "postcss": "8.4.47",
+    "postcss": "8.4.49",
     "postcss-lightningcss": "1.0.1",
     "react": "18.3.1",
     "react-docgen": "workspace:7.1.0",