chore: upgrade fumadocs-mdx to 14.2.14

Agent-Logs-Url: https://github.com/objectstack-ai/objectui/sessions/8ba16d2d-7db2-4069-8820-3df61c29b9e7

Co-authored-by: xuyushun441-sys <255036401+xuyushun441-sys@users.noreply.github.com>

Author: Claude

apps/site/package.json

@@ -33,7 +33,7 @@
     "ag-grid-community": "^35.2.1",
     "ag-grid-react": "^35.2.1",
     "fumadocs-core": "16.7.14",
-    "fumadocs-mdx": "14.2.13",
+    "fumadocs-mdx": "14.2.14",
     "fumadocs-ui": "16.7.14",
     "lucide-react": "^1.8.0",
     "next": "16.2.3",