Fix: example doesn’t work because nameTag id in HTML starts with lowercase 'n' and with uppercase 'N' in serialization

Ids are case sensitive.

`minit create:component -n name-tag` creates ids starting with a capital letter, so I used that convention.

name-tag.html:
        "owner": {
            "properties": {
                "element": {"#": "NameTag"}
            }
        }