Update for new cross_join() function

joins.qmd

@@ -783,10 +783,11 @@ knitr::include_graphics("diagrams/join/cross.png", dpi = 270)
 Cross joins are useful when generating permutations.
 For example, the code below generates every possible pair of names.
 Since we're joining `df` to itself, this is sometimes called a **self-join**.
+Cross joins use a different join function because there's no distinction between inner/left/right/full when you're matching every row.
 
 ```{r}
 df <- tibble(name = c("John", "Simon", "Tracy", "Max"))
-df |> left_join(df, join_by())
+df |> cross_join(df)
 ```
 
 ### Inequality joins