pkp/pkp-lib#10111 Fixed typo

(cherry picked from commit a2f0623)

classes/search/PreprintSearch.php

@@ -44,7 +44,7 @@ public function getSparseArray($unorderedResults, $orderBy, $orderDir, $exclude)
         $i = 0;
         $contextIds = [];
         foreach ($unorderedResults as $submissionId => $data) {
-            $data[$submissionId]['score'] = ($resultCount * $data['count']) + $i++;
+            $unorderedResults[$submissionId]['score'] = ($resultCount * $data['count']) + $i++;
             $contextIds[] = $data['server_id'];
         }