python3Packages.makefun: downgrade pytest

Uses undeclared async functions, which breaks with pytest 8.4.

pkgs/development/python-modules/makefun/default.nix

···
   setuptools-scm,
 
   # tests
-  pytestCheckHook,
+  pytest7CheckHook,
 }:
 
 buildPythonPackage rec {
···
     setuptools-scm
   ];
 
-  nativeCheckInputs = [ pytestCheckHook ];
+  nativeCheckInputs = [ pytest7CheckHook ];
 
   pythonImportsCheck = [ "makefun" ];