fix(deps): update dependency fumadocs-ui to v16.6.0

Author: renovate[bot]

package.json

@@ -20,7 +20,7 @@
     "fumadocs-openapi": "10.2.7",
     "fumadocs-twoslash": "^3.1.10",
     "fumadocs-typescript": "5.0.1",
-    "fumadocs-ui": "16.4.11",
+    "fumadocs-ui": "16.6.0",
     "lucide-react": "^0.562.0",
     "next": "16.1.6",
     "prettier": "^3.6.2",