Wrong argument name used in exception message in GetFieldInternalQuery

[melslenstra-dc]

See:

Examine/src/Examine.Lucene/Search/LuceneSearchQueryBase.cs

Line 300 in 7ab3746

throw new ArgumentException($"'{nameof(fieldName)}' cannot be null or empty", nameof(fieldName));

The name of the fieldName argument is added to the exception message, whereas the argument being checked here is actually the fieldValue. Hence, if you specify a null-or-empty fieldValue, you get a rather confusing exception that mentions the wrong argument.