Fix incorrect script path in `pyproject.toml`

[tm-kn]

This fixes the issue of inability to use the script installed via pip (#642).

Do let me know if there's a good way to add an automated test for this.

[robbrad]

I'm not sure on this one we need to check is doesn't break the custom component execution

[tm-kn]

I'm imagining instead we could delete the whole [tool.poetry.scripts] section if this is not meant to be useable this way in the first place.