fix(tests): update wikidata identifier

[mesemus]

Description

• recent update in idutils started normalizing wikidata identifier
• tests here were using fake value and thus started failing
• using real CERN's identifier fixes the test

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[tmorrell]

Makes sense, I think there were just missed in previous PR.

[tmorrell]

Closing and reopening for CI purposes. I'll merge tomorrow unless there is some objection.