polishing the workspace migration

src/main/java/zw/qantra/tm/domain/dtos/GroupBatchItemUpdateRequest.java

@@ -25,6 +25,6 @@ public class GroupBatchItemUpdateRequest {
     @JsonInclude(JsonInclude.Include.NON_NULL)
     public static class ListWrapper {
         private List<GroupBatchItemUpdateRequest> items;
-        private String userId;
+        private UUID workspaceId;
     }
 }