nbqa: disable failing test

pkgs/tools/misc/nbqa/default.nix

···
     "test_running_in_different_dir_works"
     "test_unable_to_reconstruct_message_pythonpath"
     "test_with_subcommand"
+    # Broken since ruff was updated to 0.1.2
+    # A PR was opened upstream: https://github.com/nbQA-dev/nbQA/issues/834
+    "test_ruff_works"
   ];
 
   disabledTestPaths = [