Fix doc

Author: juntaozhang

docs/content/primary-key-table/chain-table.md

@@ -167,7 +167,7 @@ you will get the following result:
 +---+----+-----+ 
 | t1|  t2|   t3| 
 +---+----+-----+ 
-| 2 |   1|   1 | 
+| 1 |   1|   1 | 
 | 2 |   1|   1 |
 +---+----+-----+ 
 ```