Update app.py

app.py

@@ -31,7 +31,7 @@ def display_board():
 #UIApp starts here
 st.set_page_config(page_title="Python - Tic Tac Toe", page_icon=":python:")
 st.header("Python - Tic Tac Toe")
-st.text("Legal Numbers: ", legal_numbers.join(","))
+st.text("Legal Numbers: ", ",".join(legal_numbers))
 
 user_input=get_userInput()
 response=validate_userInput(user_input)