`test_datacite_format_related_resources` is flaky - `django.core.exceptions.ValidationError: {'article_doi': ['"publication" is not a valid DOI']}`

[jsoref]

https://github.com/check-spelling-sandbox/osf.io/actions/runs/18598217482 (based on https://github.com/check-spelling-sandbox/osf.io/commits/6565a49957be7026e44e80f8321246fc1eaddca0 which is 0ac8740 + a number of changes that will not impact this code):

tests.identifiers.test_datacite.TestDataCiteClient
  ❌ test_datacite_format_related_resources
	django.core.exceptions.ValidationError: {'article_doi': ['"publication" is not a valid DOI']}

https://github.com/check-spelling-sandbox/osf.io/actions/runs/18598221450 (which is check-spelling-sandbox@998d1c9 which admittedly has a number of changes, but ...)

tests.identifiers.test_datacite.TestDataCiteClient
  ❌ test_datacite_format_related_resources
	django.core.exceptions.ValidationError: {'article_doi': ['"publication" is not a valid DOI']}

But, this also passed: https://github.com/check-spelling-sandbox/osf.io/actions/runs/18598262783/job/53030241782?pr=1 (00e03ad)