fix(deps): update dependency fumadocs-core to v16

Author: renovate[bot]

package.json

@@ -15,7 +15,7 @@
   "dependencies": {
     "@opennextjs/cloudflare": "^1.3.0",
     "clsx": "^2.1.1",
-    "fumadocs-core": "^15.7.11",
+    "fumadocs-core": "^16.0.0",
     "fumadocs-mdx": "^11.9.1",
     "fumadocs-openapi": "^9.3.8",
     "fumadocs-twoslash": "^3.1.0",