don't evaluate vignette for cmd check

Author: tonyk7440

vignettes/working-with-lightgbm-catboost.Rmd

@@ -11,6 +11,7 @@ vignette: >
 knitr::opts_chunk$set(
   collapse = TRUE,
   comment = "#>",
+  eval = FALSE,
   warning = FALSE,
   message = FALSE
 )