fix(deps): update dependency postcss to v8.4.29 (zio#8361)

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

Author: renovate[bot]

website/package.json

@@ -78,7 +78,7 @@
     "blended-include-code-plugin": "0.1.2",
     "clsx": "2.0.0",
     "highlight.js": "11.8.0",
-    "postcss": "8.4.28",
+    "postcss": "8.4.29",
     "prism-react-renderer": "1.3.5",
     "prism-themes": "1.9.0",
     "prismjs": "^1.29.0",