[DOCS] Update scroll.asciidoc (#32530)

docs/reference/search/request/scroll.asciidoc

@@ -79,8 +79,8 @@ next batch of results until there are no more results left to return, ie the
 `hits` array is empty.
 
 IMPORTANT: The initial search request and each subsequent scroll request each 
-return a `_scroll_id`, which may change with each request -- only the most 
-recent `_scroll_id` should be used.
+return a `_scroll_id`. While the `_scroll_id` may change between requests, it doesn’t 
+always change — in any case, only the most recently received `_scroll_id` should be used.
 
 NOTE: If the request specifies aggregations, only the initial search response
 will contain the aggregations results.