Update chat-termination.ipynb (microsoft#2393)

fix grammar mistake

website/docs/tutorial/chat-termination.ipynb

@@ -184,7 +184,7 @@
     "You can also terminate a conversation by configuring parameters of an agent.\n",
     "Currently, there are two parameters you can configure:\n",
     "\n",
-    "1. `max_consecutive_auto_reply`: This condition trigger termination if the number of automatic responses to the same sender exceeds a threshold. You can customize this using the `max_consecutive_auto_reply` argument of the `ConversableAgent` class. To accomplish this the agent maintains a counter of the number of consecutive automatic responses to the same sender. Note that this counter can be reset because of human intervention. We will describe this in more detail in the next chapter.\n",
+    "1. `max_consecutive_auto_reply`: This condition triggers termination if the number of automatic responses to the same sender exceeds a threshold. You can customize this using the `max_consecutive_auto_reply` argument of the `ConversableAgent` class. To accomplish this the agent maintains a counter of the number of consecutive automatic responses to the same sender. Note that this counter can be reset because of human intervention. We will describe this in more detail in the next chapter.\n",
     "2. `is_termination_msg`: This condition can trigger termination if the _received_ message satisfies a particular condition, e.g., it contains the word \"TERMINATE\". You can customize this condition using the `is_terminate_msg` argument in the constructor of the `ConversableAgent` class."
    ]
   },