prediction exercise differs slightly between slides and exercises

[simonpcouch]

For the "What makes a model" section, the "Predict with your model" slides and classwork differ slightly:

https://github.com/tidymodels/workshops/blob/4a6d2b911ac2932e508324baac5082d99dabaf65/slides/03-what-makes-a-model.qmd#L527-L535

https://github.com/tidymodels/workshops/blob/4a6d2b911ac2932e508324baac5082d99dabaf65/classwork/03-classwork.qmd#L123-L129