Update app.py

app.py

@@ -90,7 +90,7 @@ description = """<strong>Overview:</strong> The app demonstrates how to use a <s
                  <li>Set "Retrieval Augmented Generation" to "<strong>False</strong>" and submit prompt "What is GPT-4?" The LLM <strong>without</strong> RAG does not know the answer.</li>
                  <li>Set "Retrieval Augmented Generation" to "<strong>True</strong>" and submit prompt "What is GPT-4?" The LLM <strong>with</strong> RAG knows the answer.</li>
                  <li>Experiment with different prompts, e.g. "List GPT-4's exam capabilities." or "Write a Python program calling the GPT-4 API."</li>
-                 <li>Experiment more, for example "What is the cost and rate limit of the GPT-4 API? Answer in English, Chinese, and Russian in JSON format."</li>
+                 <li>Experiment more, for example "What is the GPT-4 API's cost and rate limit? Answer in English, Chinese, and Russian in JSON format."</li>
                  </ul>\n\n
                  <strong>Technology:</strong> <a href='https://www.gradio.app/'>Gradio</a> UI using <a href='https://openai.com/'>OpenAI</a> API via AI-first 
                  <a href='https://www.langchain.com/'>LangChain</a> toolkit with <a href='""" + WEB_URL + """'>GPT-4</a> foundation model and AI-native