Refactor scroll query parameter construction

There has been a change in how query parameters are constructed for the Elasticsearch scroll API. We now directly pass the scrollId under the PARAM_BODY key, fixing a bug where Elasticsearch would abort the query due to an URL too long. Fixes #320.

src/Concerns/ExecutesQueries.php

@@ -414,7 +414,9 @@ public function performSearch(string|null $scrollId = null): array|null
                 ->getClient()
                 ->scroll([
                     Query::PARAM_SCROLL => $this->getScroll(),
-                    Query::PARAM_SCROLL_ID => $scrollId,
+                    Query::PARAM_BODY => [
+                        Query::PARAM_SCROLL_ID => $scrollId
+                    ],
                 ]);
         } else {
             $query = $this->buildQuery();