Weird EOT character

[leokim-l]

yaml output by ontogpt contained a \x0004 character, which seems to be an end of transmission in unicode, see
https://en.wikipedia.org/wiki/End-of-Transmission_character

The following fixes it:
https://github.com/monarch-initiative/malco/blob/653291d119a5fffb31b2779b8a52221dadfea50e/src/malco/post_process/post_process_results_format.py#L26

It could have been produced by the following:
https://github.com/monarch-initiative/malco/blob/653291d119a5fffb31b2779b8a52221dadfea50e/src/malco/run/run.py#L48-L51

This issue is not pressing and more of a reminder to me to eventually look into it, but @caufieldjh let me know if you are interseted.

[caufieldjh]

If that character is in the raw output (that is, it's coming directly from the LLM) then ontogpt should catch it (but it doesn't right now AFAIK).
Opened monarch-initiative/ontogpt#454