Small correction for error shown when using invalid ENCRYPTION_KEY_ID

12.0.0-opt>ALTER TABLE t1 ENCRYPTION_KEY_ID=2;

Query OK, 0 rows affected (0.007 sec)

Records: 0  Duplicates: 0  Warnings: 0

12.0.0-opt>ALTER TABLE t1 ENCRYPTION_KEY_ID=3;

ERROR 1478 (HY000): Table storage engine 'InnoDB' does not support the create option 'ENCRYPTION_KEY_ID'

The reason the error is shown is that the specified encryption_key_id did not exist in the keyfile used.

The message is incorrect: InnoDB does support the option ENCRYPTION_KEY_ID, as per the example directly above it.

Instead, we could use something like "ENCRYPTION_KEY_ID 3 does not exist in the keyfile".