Added xsd:anyURI datatype for non-standard vcard properties - to review

[tgra]

https://github.com/solid/shape-generation-artefacts/blob/main/shapes/AddressBook/addressBookShape.ttl

The addressBook shape was already defined as SHACL in a SolidOS repo.

Original SHACL used non-standard vcard extension where datatypes are not defined.

https://raw.githack.com/solid/contacts/refs/heads/main/vcard-extension-addressbook.ttl

Added sh:datatype xsd:anyURI; in AddressBookShape for these properties