use doi instead of conceptdoi

DOI exists is probably what you want here:

• it refers directly to the record while the concept one refers to all versions
• conceptdoi does not always exist, in particular if a pre-existing DOI was provided when the record was created

src/components/services/query_results/ZenodoResults.js

@@ -21,7 +21,7 @@ export default function ZenodoResults({ catalog }) {
         <br/>
         <br/>
         <h4><a href={hits.links.latest_html} target="_blank"> {hits.metadata.title.replaceAll(regex, '')} </a></h4>
-        <a href={hits.links.conceptdoi} target="_blank"> <img src={hits.links.badge} alt="DOI"/> </a>
+        <a href={hits.links.doi} target="_blank"> <img src={hits.links.badge} alt="DOI"/> </a>
         <br/>
         {hits.metadata.description.replaceAll(regex, '').substring(0,200)}...
         </>