Minor style updates

app.py

@@ -79,7 +79,7 @@ def vote(data: gr.LikeData):
 # The Gradio App interface
 with gr.Blocks() as demo:
     gr.Markdown("""<h1><center>Technocomplex Bot</center></h1>""")
-    gr.Markdown("""<h1><center>This is a demo for Our Complex Relationships with Technology course, Duke, 2023</center></h1>""")
+    gr.Markdown("""<h3><center>This is a demo for Our Complex Relationships with Technology course, Duke, 2023</center></h3>""")
     chatbot = gr.Chatbot(label="Technocomplex Bot")
     textbox = gr.Textbox(label="Start chatting here!")
     clear = gr.Button("Clear")