Update repl.py

use   ~/.config/ptpython/config.py     instead of     ~/.ptpython/config.py

Author: sisrfeng

ptpython/repl.py

@@ -604,7 +604,7 @@ def enable_deprecation_warnings() -> None:
     warnings.filterwarnings("default", category=DeprecationWarning, module="__main__")
 
 
-def run_config(repl: PythonInput, config_file: str = "~/.ptpython/config.py") -> None:
+def run_config(repl: PythonInput, config_file: str = "~/.config/ptpython/config.py") -> None:
     """
     Execute REPL config file.