fix(metrics/insights): unexpected error in sponsors plugin response

[lowlighter]

Discussed in https://github.com/lowlighter/metrics/discussions/1350

^{Originally posted by PhilipDeegan January 15, 2023} Going to the link: https://metrics.lecoq.io/insights?user=PhilipDeegan

Shows at the top "Unexpected error".

And it seems that some of my contributions are missing (nvidia/thrust for example), so it could be related.

Feel free to close if this is a known issue.