wrong link in some special cases (repository and NL)
When a repository item and a national licence item are merged together, although they have different doi's, the linking is sometimes wrong, because it takes the first doi, not the publisher doi.
The solution could be to adapt getNationalLicenceData() in module/Swissbib/src/Swissbib/RecordDriver/SolrMarc.php to take the doi from the 035 instead of the 024 marc field