fix a minor mistake

app.py

@@ -10,7 +10,7 @@ model_selection = st.radio("Select model to use:", ["Gemma", "Tinyllama"])
 
 # Input for submitting new transactions
 new_transactions_input = st.text_area("Enter your transactions (comma-separated)")
-submit_button = st.button("Submit New Transactions", type='primary')
+submit_button = st.button("Submit New Transactions", type="primary")
 
 if submit_button:
     # Split transactions and strip whitespace
@@ -85,7 +85,7 @@ if processing:
     st.button("Submit New Transactions", disabled=True)
 else:
     st.text_area("Enter your transactions (comma-separated)", value=new_transactions_input)
-    st.radio("Select model to use:", ["Gemma", "Tinyllama"], index=0)
+    st.radio("Select model to use:", ["Gemma", "Tinyllama"], index=1)
     st.button("Submit New Transactions")
 
 if st.button("Reset"):