Internal Server Errors on artifact upload

Seems to be some persistent issue with uploading files to the coordinator.

Repro	https://gitlab.com/nekokatt/hikari/-/jobs/584790435
runner	shared-runners-manager-5.gitlab.com (#380986 (closed))

 Uploading artifacts...
 public/mypy.xml: found 2 matching files            
 WARNING: Uploading artifacts to coordinator... failed  id=584790435 responseStatus=500 Internal Server Error status=500 Internal Server Error token=AXtj1u8t
 WARNING: Retrying...                                context=artifacts-uploader error=invalid argument
 WARNING: Uploading artifacts to coordinator... failed  id=584790435 responseStatus=500 Internal Server Error status=500 Internal Server Error token=AXtj1u8t
 WARNING: Retrying...                                context=artifacts-uploader error=invalid argument
 WARNING: Uploading artifacts to coordinator... failed  id=584790435 responseStatus=500 Internal Server Error status=500 Internal Server Error token=AXtj1u8t