fix(langgraph): In this example, there is a slight problem with the c…

…ode writing. Please fix it.

examples/chatbots/customer_support_small_model.ipynb

@@ -144,7 +144,7 @@
     "do not try to answer the question directly or gather information.\n",
     "Instead, immediately transfer them to the billing or technical team by asking the user to hold for a moment.\n",
     "Otherwise, just respond conversationally.`;\n",
-    "  const supportResponse = model.invoke([\n",
+    "  const supportResponse = await model.invoke([\n",
     "    { role: \"system\", content: SYSTEM_TEMPLATE },\n",
     "    ...state.messages,\n",
     "  ]);\n",
@@ -181,7 +181,7 @@
     "  // Some chat models can return complex content, but Together will not\n",
     "  const categorizationOutput = JSON.parse(categorizationResponse.content as string);\n",
     "  // Will append the response message to the current interaction state\n",
-    "  return { messages: supportResponse, nextRepresentative: categorizationOutput.nextRepresentative };\n",
+    "  return { messages: [supportResponse], nextRepresentative: categorizationOutput.nextRepresentative };\n",
     "};"
    ]
   },