Assurance: 6.1. id_document: Incorrect example

[Vladimir Dzhuvinov]

In example https://openid.net/specs/openid-connect-4-identity-assurance-1_0.html#id-document-1

According to the spec the nationalities must be a string JSON array (the claim name also appears to be incorrect):

https://openid.net/specs/openid-connect-4-identity-assurance-1_0.html#rfc.section.3.1

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[Torsten Lodderstedt]

transferred to https://bitbucket.org/openid/ekyc-ida/issues/1130/assurance-61-id_document-incorrect-example