Correct documentation of values_fill

It looks like it was copied over from `values_fn`

Author: DavisVaughan

R/pivot-wide.R

@@ -42,8 +42,8 @@
 #' @param values_fill Optionally, a (scalar) value that specifies what each
 #'   `value` should be filled in with when missing.
 #'
-#'   This can be a named list if you want to apply different aggregations
-#'   to different value columns.
+#'   This can be a named list if you want to apply different fill values to
+#'   different value columns.
 #' @param values_fn Optionally, a function applied to the `value` in each cell
 #'   in the output. You will typically use this when the combination of
 #'   `id_cols` and `value` column does not uniquely identify an observation.