`legalIdentifier` spec and examples are inconsistent

[kvakes]

In orgid-json-schema.yaml file it's just a "string" (example 1), while in vocabulary.md it is an object (example 2).

Example `:

    "legalEntity": {
        "legalName": "Acme, Corp.",
        "alternativeName": "Acme",
        "legalIdentifier": "US12345567",
        "identifiers":

Example 2:

{
    "type": "Commercial register number",
    "value": "CH-170.7.000.838-1"
}

[kvakes]

Perhaps it's not a bad idea to do something like this though:

{
    "legalEntity": {
        "legalName": "Acme, Corp.",
        "legalIdentifier": {
            "authority": "California Secretary of State",
            "value": "CA12345567",
            "uri": "https://businesssearch.sos.ca.gov/"
        }
    }
}