Fix the scrolling example code error

Signed-off-by: r6hk <[email protected]>

Author: r6hk

src/main/antora/modules/ROOT/pages/repositories/scrolling.adoc

@@ -12,15 +12,15 @@ Similar to consuming a Java `Iterator<List<…>>` by obtaining the next batch of
 [source,java]
 ----
 ScrollPosition position = ScrollPosition.offset();
-Window<User> users;
-do {
+while (true) {
     users = repository.findFirst10ByLastnameOrderByFirstname("Doe", position);
+    if (users.isEmpty()) break;
     for (User u : users) {
         // consume the user
     }
-    // update the position
-    position = users.positionAt(users.size() - 1);
-} while (!users.isEmpty() && users.hasNext());
+    if (!users.hasNext()) break;
+    users = users.positionAt(users.size() - 1);
+}
 ----
 
 [NOTE]