Correcting SQL for required_options column

# Changes

* Replaces string “1” with integer `1`, as the `required_options` column is `smallint(5) unsigned`

# Testing

* Obvious change; only a code review is necessary

```
mysql> describe catalog_product_entity;
+------------------+----------------------+------+-----+---------+----------------+
| Field            | Type                 | Null | Key | Default | Extra          |
+------------------+----------------------+------+-----+---------+----------------+
| entity_id        | int(10) unsigned     | NO   | PRI | NULL    | auto_increment |
| entity_type_id   | smallint(5) unsigned | NO   | MUL | 0       |                |
| attribute_set_id | smallint(5) unsigned | NO   | MUL | 0       |                |
| type_id          | varchar(32)          | NO   |     | simple  |                |
| sku              | varchar(64)          | YES  | MUL | NULL    |                |
| created_at       | timestamp            | YES  |     | NULL    |                |
| updated_at       | timestamp            | YES  |     | NULL    |                |
| has_options      | smallint(6)          | NO   |     | 0       |                |
| required_options | smallint(5) unsigned | NO   |     | 0       |                |
| erp_arrival_date | datetime             | YES  |     | NULL    |                |
+------------------+----------------------+------+-----+---------+----------------+
```