Doctest tutorials/rest-api.md

[pavithraes]

Tracking:
https://github.com/Quansight/ragna/pull/151/files#diff-5c6dddc0c85981eb75bdb49d400e82c9271918e138990baba53ac34cbcf2aaacR9-R14

    # FIXME: The REST API tutorial uses await outside sync functions
    # this would work in a Jupyter Notebook, but not in a Python script
    # We'll also need to have the API running to test this properly.
    if fpath == pathlib.Path("docs/tutorials/rest-api.md"):
        with pytest.raises(SyntaxError, match="'await' outside function"):
            check_md_file(fpath=fpath, memory=True)

[pmeier]

Closing this since we no longer need doc tests for the tutorials and examples after #89.