Update app.py

app.py

@@ -100,7 +100,7 @@ with gr.Blocks(css=css) as demo:
 
     with gr.Column(elem_id="col-container"):
         gr.Markdown("""## OpenAI ChatGPT Demo
-                    Using the ofiicial API (gpt-3.5-turbo model)
+                    Using the official API (gpt-4 model)
                     Prompt templates from [awesome-chatgpt-prompts](https://github.com/f/awesome-chatgpt-prompts).""",
                     elem_id="header")