Fixes this error:

_____________ ERROR at setup of test_cm_config_log_only_if_changed _____________

tmp_path = PosixPath('/tmp/pytest-of-mockbuild/pytest-0/test_cm_config_log_only_if_cha0')

    @pytest.fixture()
    def cwd_tmp_path(tmp_path):
        # Run the whole test from inside tmp_path
>       with tmp_path.cwd():
E       TypeError: 'PosixPath' object does not support the context manager protocol

/builddir/build/BUILD/python-jupytext-1.16.2-build/jupytext-1.16.2/tests/conftest.py:50: TypeError

--- jupytext-1.16.2/tests/conftest.py.orig	2024-05-05 16:34:48.000000000 -0600
+++ jupytext-1.16.2/tests/conftest.py	2024-06-18 08:13:53.192133400 -0600
@@ -1,3 +1,4 @@
+import contextlib
 import itertools
 import os.path
 import re
@@ -47,7 +48,7 @@ def cwd_tmpdir(tmpdir):
 @pytest.fixture()
 def cwd_tmp_path(tmp_path):
     # Run the whole test from inside tmp_path
-    with tmp_path.cwd():
+    with contextlib.chdir(tmp_path):
         yield tmp_path