Update app.py

app.py

@@ -67,7 +67,8 @@ def user_input(user_question, api_key):
 def main():
     st.set_page_config(page_title="Chat PDF")
     st.header("CSC 121: Computers and Scientific Thinking (Chatbot)")
-    st.subheader("Ask a question ONLY from the CSC 121 textbook of Dr. Reed", divider=True)
+    st.subheader("Ask a question ONLY from the CSC 121 textbook of Dr. Reed")
+    st.markdown("---")
 
     user_api_key = st.text_input("Enter your API key (optional)", type="password")
     user_question = st.text_input("Ask a question")