Update app.py

app.py

@@ -52,7 +52,7 @@ if "chat" not in st.session_state:
     st.session_state.chat = model.start_chat(history = [
         {
             "role": 'user',
-            "parts": 'You are playing a random rock paper scissor game. For rock will say "Rock", for paper will say "Paper" and for scissor will say "Scissor".  Pick a random word out of three and reply once I do my move.'
+            "parts": 'You are playing a random rock paper scissor game. For rock will say "Rock", for paper will say "Paper" and for scissor will say "Scissor".  Pick a random word out of three and reply in single word once I do my move.'
         },
         {
             "role": 'model',