`test_execution_state` is flaky on Windows and more often fails than not

## Description

Across multiple PRs and on the `main` branch this failure is evident:

```
FAILED tests/services/kernels/test_execution_state.py::test_execution_state - AssertionError: assert 'starting' == 'busy'
```

https://github.com/jupyter-server/jupyter_server/actions/runs/19349886439/job/55359089935