Valid `credential_signing_alg_values_supported` in `supported_selective_disclosure` schema

[matteo-cristino]

In case of ldp_vc credential all the supported credential_signing_alg_values_supported are described in https://w3c-ccg.github.io/ld-cryptosuite-registry/ (can be found in openid4vci draft 16) while for the moment we accept only Ed25519Signature2018 (see zencode_sd_jwt.lua#L130).

The page is old and for example es256 algorithm is missing, so I suggest that for the moment we drop the check on credential_signing_alg_values_supported for ldp_vc and reactivate them back on when we this link will be updated.

[puria]

You maybe want you put it in changedetection?