Update dependency marked to v16

Author: renovate[bot]

package-lock.json

@@ -15,7 +15,7 @@
         "front-matter": "^4.0.2",
         "glob": "^10.4.2",
         "markdown-to-jsx": "^7.7.3",
-        "marked": "^14.1.2",
+        "marked": "^16.0.0",
         "next": "15.4.5",
         "react": "^19.1.0",
         "react-dom": "^19.1.0",