Clarify adviser no-move display

Agent-Logs-Url: https://github.com/fsmosca/Python-Easy-Chess-GUI/sessions/bd37aa40-7697-4a58-83fa-686e0e9b2592

Co-authored-by: fsmosca <22366935+fsmosca@users.noreply.github.com>

Author: Copilot

python_easy_chess_gui.py

@@ -2109,7 +2109,7 @@ def play_game(self, window: sg.Window, board: chess.Board):
                                 else:
                                     bestmove_parts = msg.split(maxsplit=1)
                                     bestmove = bestmove_parts[1] \
-                                        if len(bestmove_parts) > 1 else 'None'
+                                        if len(bestmove_parts) > 1 else '(none)'
                                     adviser_line = f'bestmove {bestmove}'
                                 adviser_line += ' - ' + self.adviser_id_name
                                 window.Element('advise_info_k').Update(adviser_line)