[updates] fix: Ignore index name comparison when no name is defined

Author: stenya

service/updates/index.go

@@ -232,7 +232,7 @@ func (index *Index) ShouldUpgradeTo(newIndex *Index) error {
 		// Upgrade in any case.
 		return nil
 
-	case index.Name != newIndex.Name:
+	case len(index.Name) > 0 && index.Name != newIndex.Name:
 		return errors.New("new index name does not match")
 
 	case index.Published.After(newIndex.Published):