Minor issue: classifcation methods updated in GEE

[pol-todo]

Hi Shaun,

Firstly, great tutorial series: Very high value to students.

Secondly, your code snippet mentions a deprecated method. The tutorial says use ee.Classifier.cart().train() , but the cart method was changed to smileCart().

Here's the error: https://groups.google.com/g/google-earthengine-announce/c/rCu4FP_Cn08/m/DqC192X9BAAJ

Thanks again for making this series available!

Paul