Use stock script

For pre-Dataverse 6.4 (which doesn't recognize the *.glb files, one can
edit the Accept header in the voyager-explorer.min.js script to accept *
in addition to text/plain (there is only one place this happens in their
current script so easy to find). 6.4, in addition to adding the
mimetype, changes the file download api to @produce */* (making
text/plain an OK request rather than a 406 error).

previewers/betatest/js/voyager.js

@@ -15,5 +15,5 @@ function writeContent(fileUrl, file, title, authors) {
     const fileName = fileUrl.substring(lastIndexOfChar + 1);
     console.log(fileUrl);
     $("voyager-explorer").attr("root", rootUrl).attr("model", fileName);
-    $.getScript("lib/voyager-explorer.min.v0.42.1.gdcc.js");
+    $.getScript("https://3d-api.si.edu/resources/js/v0.43.0/voyager-explorer.min.js");
 }