The description of The cluster tables for statement summary is wrong

[Mini256]

File: /master/statement-summary-tables.md

这三张表用字段 INSTANCE 表示 TiDB server 的地址，其他字段与 statements_summary 相同。

The statements_summary_evicted table has a different table structure than the other two statements_summary* tables.

INFORMATION_SCHEMA> desc cluster_statements_summary_evicted;
+---------------+-------------+------+-----+---------+-------+
| Field         | Type        | Null | Key | Default | Extra |
+---------------+-------------+------+-----+---------+-------+
| INSTANCE      | varchar(64) | YES  |     | <null>  |       |
| BEGIN_TIME    | timestamp   | YES  |     | <null>  |       |
| END_TIME      | timestamp   | YES  |     | <null>  |       |
| EVICTED_COUNT | bigint(64)  | NO   |     | <null>  |       |
+---------------+-------------+------+-----+---------+-------+
4 rows in set
Time: 0.259s

[qiancai]

@Mini256 Thanks for your feedback!

Please check if the doc changes in #11330 can solve this issue.