Change the synonym relationship of nomen nudum to unavaliable or invalid relationship

[mabecabrera]

To be coherent with the Nomenclature Code we need to change all the synonym relationships created for nomen nudums to the unavaliable or invalid relationship.

Here is the list as a result of the filtering of all the names with nomen nudum status and with synonym of relationship.
https://sfg.taxonworks.org/tasks/taxon_names/filter?per=50&nomenclature_code=Iczn&taxon_name_classification%5B%5D=TaxonNameClassification%3A%3AIczn%3A%3AUnavailable%3A%3ANomenNudum&taxon_name_relationship_type%5B%5D=TaxonNameRelationship%3A%3AIczn%3A%3AInvalidating%3A%3ASynonym&extend%5B%5D=parent&page=1