Update app.py

app.py

@@ -56,7 +56,7 @@ if "chat" not in st.session_state:
         },
         {
             role: 'model',
-            parts: 'Alright, let's play a random Rock-Paper-Scissors game. Make your first move!''
+            parts: 'Alright, let us play a random Rock-Paper-Scissors game. Make your first move!'
         }
     ])