Correctly export RNA type
Correctly export RNA type

We were exporting ncRNA when this was not a standard INSDC rna type.
Additionally, we would export the type were were given, not the type we
compute. It is better and more consistent with the database to export
the RNA type we compute.

RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline