tests/leak-fixtures/vec0-create.sql fails: vec0 constructor error: Could not parse 'y'

[This line](https://github.com/asg017/sqlite-vec/blob/main/tests/leak-fixtures/vec0-create.sql#L7) fails:

```
create virtual table v using vec0(y);
Runtime error near line 7: vec0 constructor error: Could not parse 'y'
```