docs(Session._list_windows): Fix docstring

Author: tony

src/libtmux/session.py

@@ -656,7 +656,7 @@ def find_where(self, kwargs: t.Dict[str, t.Any]) -> t.Optional[Window]:
         return self.windows.get(default=None, **kwargs)
 
     def _list_windows(self) -> t.List["WindowDict"]:
-        """Return list of windows (deprecated in favor of :meth:`.windows`).
+        """Return list of windows (deprecated in favor of :attr:`.windows`).
 
         .. deprecated:: 0.16