飞书发生user event时，获取user legal name

src/main/java/com/sfa/common/core/utils/sdk/FeiShuUtil.java

@@ -386,7 +386,7 @@ public class FeiShuUtil {
                     .batchGetEmployeeReqBody(BatchGetEmployeeReqBody.newBuilder()
                             .fields(new String[]{
                                     "employee_number",
-                                    "person_info.preferred_name",
+                                    "person_info.legal_name",
                                     "department_id",
                                     "person_info.bank_account_list"
                             })