Apply ruff/flake8-pytest-style rule PT023

PT023 Use `@pytest.mark.skip_commit` over `@pytest.mark.skip_commit()`

Author: DimitriPapadopoulos

testing/test_file_finder.py

@@ -212,7 +212,7 @@ def test_symlink_not_in_scm_while_target_is(inwd: WorkDir) -> None:
 
 
 @pytest.mark.issue(587)
-@pytest.mark.skip_commit()
+@pytest.mark.skip_commit
 def test_not_commited(inwd: WorkDir) -> None:
     assert find_files() == []