upgrade copilotkit to 1.51.3

Author: wenluowang

package.json

@@ -9,8 +9,8 @@
   },
   "license": "MIT",
   "dependencies": {
-    "@copilotkit/react-core": "^1.8.13",
-    "@copilotkit/react-ui": "^1.8.13",
+    "@copilotkit/react-core": "^1.51.3",
+    "@copilotkit/react-ui": "^1.51.3",
     "@vercel/analytics": "^1.1.1",
     "next": "^14.2.26",
     "nextra": "^2.13.2",