DevLangCodeRetriever: Adjust property-id used for language code

[micgro42]

This was changed in production to user the broader coverage provided by IETF code, see T348923.

Bug: T348923

[github-actions]

https://2ee4b0cddd724951d2af84f13a90f4462dc1--new-lexeme-special-page.netlify.app

[lucaswerkmeister]

Hm, this doesn’t seem to be working properly for me:

It’s making the right API request, and the API returns en-GB, yet it neither accepts the language code nor complains that it’s invalid. It’s acting as if there was no statement… any idea why?

[lucaswerkmeister]

Aha, I’m pretty sure return processWbGetClaimsResponse( response, 'P218' ); also needs to use the new property ID :)

[lucaswerkmeister]

Yeah, with that it seems to be working (“This Item has an unrecognized language code. Please select one below.”).

[micgro42]

Grr, why do we have that literal string in two places!?

/me looks at blame for that file.

Ah, of course! I did!

[micgro42]

ok, with that cypress fixup it should be fine now 🤞

[lucaswerkmeister]

(MwApiLangCodeRetriever.test.ts also uses P218 in some test data, but I think that’s fully unrelated and can be updated separately.)