dictionary example for labs() (#6713)

* dictionary example for labs()

The example for the dictionary argument of labs() produces a warning and doesn't work (see <https://ggplot2.tidyverse.org/reference/labs.html#ref-examples>) unless you use `dictionary`, not `dict`

#> Ignoring unknown labels:
#> • dict : "c(disp = \"Displacment\", cyl = \"Number of cylinders\", mpg = \"Miles per gallon\", wt = \"Weight (1000 lbs)\")"

* `devtools::document()`

---------

Co-authored-by: Teun van den Brand <[email protected]>

Author: debruine

R/labels.R

@@ -186,7 +186,7 @@ make_labels <- function(mapping) {
 #' p + labs(x = "New x label")
 #'
 #' # Set labels by variable name instead of aesthetic
-#' p + labs(dict = c(
+#' p + labs(dictionary = c(
 #'   disp = "Displacment", # Not in use
 #'   cyl  = "Number of cylinders",
 #'   mpg  = "Miles per gallon",