Clarify the expected values of the `_audit_conform.dict_name` data item

[vaitkus]

The _audit_conform.dict_name data item is defined as following:

Name identifying highest-level data dictionary defining
data names used in this file.

This leaves me with the following questions:

• Is the "dictionary name" in this case be taken from _dictionary.title (e.g. CIF_CORE) or should it be derived in some other way (e.g. following the ITC convention of coreCIF)? Given that this data item serves as the primary key, it would make sense to be more specific here. Personally, using _dictionary.title seems more manageable.
• Can the AUDIT_CONFORM loop reference non-DDLm dictionaries, i.e. DDL1 or DDL2 dictionaries? The _audit_conform.dict_version data item could accommodate this (it is not restricted to the DDLm version data type format). If yes, it should be further specified how the dictionary name is derived in those instances.

Finally, adding a few example values (or a category usage example) would also go a long way in clarifying things.