Use \dontrun instead of \donttest for non-essential examples

This is not so nice for the user experience because of the
wrappers arround examples:

 ## Not run
 ...
 ## End(Not run)

but it is necessary to some extent to pass automatic CRAN
checks under all circumstances, which actually do run
the donttest examples since R 4.0 with a time limit of apparently
20min in total.

Change-Id: If09b1aa381e26179ec1a36edd9d8b07116e3c33e
diff --git a/R/ci.R b/R/ci.R
index 5de87a2..a0c04f7 100644
--- a/R/ci.R
+++ b/R/ci.R
@@ -22,7 +22,8 @@
 #' @importFrom tibble remove_rownames
 #' @importFrom dplyr enquo rename starts_with
 #' @examples
-#' \donttest{
+#' \dontrun{
+#'
 #' library(ggplot2)
 #' kco <- new("KorAPConnection", verbose=TRUE)
 #' expand_grid(year=2015:2018, alternatives=c("Hate Speech", "Hatespeech")) %>%