Include "mandatory" in an example

[Michael Jones]

I would suggest including a use of the metadata term mandatory in one or more examples. Separately, I'm curious, why was the metadata parameter name mandatory used instead of the essential term from OpenID Connect?

The term is defined in several places, the first being https://openid.bitbucket.io/connect/openid-4-verifiable-credential-issuance-1_0.html#name-credential-issuer-metadata-2 .

[Mark Haine]

Migrated to GitHub

https://github.com/openid/OpenID4VCI