pl.col(col).last() example shows both "max" and "last" behaviour

[DeflateAwning]

Description

The pl.col(col).last() example shows both "max" and "last" behaviour. In some tools (e.g., Power BI DAX), LAST() actually means "max non-null value" (which is insane). It would be helpful to show an example where the values are [1, 3, 2], and show that .last() gets 2 (the final value in the list, as ordered at runtime), instead of the maximum value.

Link

https://docs.pola.rs/api/python/stable/reference/expressions/api/polars.Expr.last.html#polars.Expr.last

[orlp]

Feel free to make a pull request to update the docs.

The same also needs to be done to polars.Expr.arr.last and polars.LazyFrame.last from a quick scan.