python313Packages.colormath2: use pytest7 to fix test execution

pkgs/development/python-modules/colormath2/default.nix

···
   setuptools,
   networkx,
   numpy,
-  pytestCheckHook,
+  pytest7CheckHook,
 }:
 
 buildPythonPackage rec {
···
     numpy
   ];
 
-  nativeCheckInputs = [ pytestCheckHook ];
+  nativeCheckInputs = [ pytest7CheckHook ];
 
   pythonImportsCheck = [ "colormath2" ];