Fix: ensure all functions have been called before running chat generator (#364)

Author: mpangrazzi

tutorials/40_Building_Chat_Application_with_Function_Calling.ipynb

@@ -1127,7 +1127,9 @@
     "\n",
     "                ## Append function response to the messages list using `ChatMessage.from_function`\n",
     "                messages.append(ChatMessage.from_function(content=json.dumps(function_response), name=function_name))\n",
-    "                response = chat_generator.run(messages=messages, generation_kwargs={\"tools\": tools})\n",
+    "\n",
+    "            # After processing all function calls, call `chat_generator.run` once\n",
+    "            response = chat_generator.run(messages=messages, generation_kwargs={\"tools\": tools})\n",
     "\n",
     "        # Regular Conversation\n",
     "        else:\n",