Update data-visualize.qmd (#1036)

Added example for facet_wrap

data-visualize.qmd

@@ -409,7 +409,7 @@ The variable that you pass to `facet_wrap()` should be discrete.
 
 ggplot(data = mpg) + 
   geom_point(mapping = aes(x = displ, y = hwy)) + 
-  facet_grid(drv ~ cyl)
+  facet_wrap(~cyl)
 ```
 
 To facet your plot on the combination of two variables, add `facet_grid()` to your plot call.