`test_generate_og_image_job` is flaky

`test_generate_og_image_job` fails reliably for me on both of my development setups due to minor kerning differences in the snapshots. I've been putting up with this for a while and will probably have to continue to do so, but it occurred to me that I should document it somewhere in case I ever have time to investigate this. In repo: <img width="1200" height="630" alt="Image" src="https://github.com/user-attachments/assets/c85bd77a-4743-4181-b71f-ba799cd9e9aa" /> My result: <img width="1200" height="630" alt="Image" src="https://github.com/user-attachments/assets/5ad98cca-d43a-4f96-bde1-f1e27454e391" /> I'm assuming this is something about it using the specific font file installed on my computer.