docs: resolve one sql error

docs/en/12-taos-sql/12-keywords.md

@@ -281,6 +281,7 @@ There are about 200 keywords reserved by TDengine, they can't be used as the nam
 Get the table name and tag values of all subtables in a STable.
 ```mysql
 SELECT TBNAME, location FROM meters;
+```
 
 Count the number of subtables in a STable.
 ```mysql

docs/zh/12-taos-sql/12-keywords/index.md

@@ -321,6 +321,7 @@ title: TDengine 参数限制与保留关键字
 获取一个超级表所有的子表名及相关的标签信息：
 ```mysql
 SELECT TBNAME, location FROM meters;
+```
 
 统计超级表下辖子表数量：
 ```mysql