Fix typo in agentchat_MathChat.ipynb

requries -> requires

Author: eltociear

notebook/agentchat_MathChat.ipynb

@@ -240,7 +240,7 @@
     "Check out `MathUserProxyAgent.generate_init_message(problem, prompt_type='default', customized_prompt=None)`:\n",
     "- You may choose from `['default', 'python', 'two_tools']` for parameter `prompt_type`.  We include two more prompts in the paper: \n",
     "    1. `'python'` is a simplified prompt from the default prompt that uses Python only. \n",
-    "    2. `'two_tools'` further allows the selection of Python or Wolfram Alpha based on this simplified `python` prompt. Note that this option requries a Wolfram Alpha API key and put it in `wolfram.txt`.\n",
+    "    2. `'two_tools'` further allows the selection of Python or Wolfram Alpha based on this simplified `python` prompt. Note that this option requires a Wolfram Alpha API key and put it in `wolfram.txt`.\n",
     "\n",
     "- You can also input your customized prompt if needed: `mathproxyagent.generate_init_message(problem, customized_prompt=\"Your customized prompt\")`. Since this mathproxyagent detects '\\boxed{}' as termination, you need to have a similar termination sentence in the prompt: \"If you get the answer, put the answer in \\\\boxed{}.\". If the customized is provided, the `prompt_type` will be ignored.\n",
     "\n",