Michael Schmoock a22a73478e ci: update pytest ...

Some jobs were failing with an error that seems to be raised by an
outdated pytest with a newer pytest-rerunfailures. We let pip choose...

```
2022-12-28T16:41:10.1173259Z   File "/tmp/tmp_82tmdi_/lib/python3.7/site-packages/pytest_rerunfailures.py", line 7, in <module>
2022-12-28T16:41:10.1173840Z     from _pytest.resultlog import ResultLog
2022-12-28T16:41:10.1174387Z ModuleNotFoundError: No module named '_pytest.resultlog'
```

2023-01-01 16:04:20 +01:00

..

test.py

ci: update pytest

2023-01-01 16:04:20 +01:00