`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 0ac8740d0eeededc8439e1084ff06abeaa53aa15 + 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 https://github.com/check-spelling-sandbox/osf.io/commit/998d1c92fa3c1dd0a6c07710ee8ed73be6be0347 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 (https://github.com/CenterForOpenScience/osf.io/commit/00e03ad604c5cab244f15f5a553c746be37fd4e5)