Issue on docs

[Envaitenet]

Path:/zh-CN/docs/2.1/table-design/data-model/aggregate
AGG_STATE示例错误

insert into aggstate select 3,sum_union(k2),group_concat_union(k3) from aggstate;
修改：insert into aggstate select 3,sum(v1),group_concat_union(v2) from aggstate;

select sum_merge(k2) , group_concat_merge(k3)from aggstate;
修改select sum(v1) , group_concat_merge(v2) from aggstate;

select sum_merge(k2) , group_concat_merge(k3)from aggstate where k1 != 2;
修改select sum(v1) , group_concat_merge(v2)from aggstate where k1 != 2;