python313Packages.jsonschema-spec: migrate to pytest-cov-stub

pkgs/development/python-modules/jsonschema-spec/default.nix

···
 
   # tests
   pytestCheckHook,
+  pytest-cov-stub,
   responses,
 }:
 
···
   };
 
   postPatch = ''
-    sed -i "/^--cov/d" pyproject.toml
-
     substituteInPlace pyproject.toml \
       --replace 'referencing = ">=0.28.0,<0.30.0"' 'referencing = ">=0.28.0"'
   '';
···
 
   nativeCheckInputs = [
     pytestCheckHook
+    pytest-cov-stub
     responses
   ];