fix 修复 update sql 书写错误

script/sql/update/oracle/update_5.0-5.1.sql

@@ -148,4 +148,4 @@ insert into sys_role_menu values ('2', '1065');
 
 
 update sys_dept set leader = null;
-ALTER TABLE sys_dept ALTER COLUMN leader TYPE int8;
+ALTER TABLE sys_dept MODIFY (leader NUMBER(20))

script/sql/update/postgres/update_5.0-5.1.sql

@@ -147,4 +147,4 @@ insert into sys_role_menu values ('2', '1065');
 
 
 update sys_dept set leader = null;
-alter table sys_dept modify column leader bigint null default null comment '负责人' after order_num;
+ALTER TABLE sys_dept ALTER COLUMN leader TYPE int8;