Fix typing

Author: lantiga

src/lightning/pytorch/cli.py

@@ -48,12 +48,12 @@
         set_config_read_mode,
     )
 
-    def _parse_known_args_patch(self, args=None, namespace=None):
+    def _parse_known_args_patch(self, args: Any=None, namespace: Any=None) -> tuple[Any]:
         namespace, args = super(ArgumentParser, self)._parse_known_args(args, namespace, intermixed=False)
         return namespace, args
 
     if sys.version_info >= (3, 12, 8):
-        ArgumentParser._parse_known_args = _parse_known_args_patch
+        setattr(ArgumentParser, "_parse_known_args", _parse_known_args_patch)
 
     register_unresolvable_import_paths(torch)  # Required until fix https://github.com/pytorch/pytorch/issues/74483
     set_config_read_mode(fsspec_enabled=True)