fix: 'delete_on_close' is 3.12 only, use 'delete'

src/pydrex/logger.py

@@ -57,7 +57,7 @@
 
 >>> import tempfile
 >>> import io
->>> kwargs = { "delete_on_close": False } if sys.platform == "win32" else {}
+>>> kwargs = { "delete": False } if sys.platform == "win32" else {}
 >>> tmp = tempfile.NamedTemporaryFile(**kwargs)
 >>> pydrex_logger.debug("debug message")
 >>> with pydrex.io.logfile_enable(io.TextIOWrapper(tmp.file)):  # doctest: +ELLIPSIS