edit based on John's comments

Author: LittleBeannie

vignettes/sim_fixed_design_custom.Rmd

@@ -275,10 +275,11 @@ one_sim <- function(sim_id = 1,
 }
 ```
 
-After that, we will execute `one_sim()` multiple times using parallel computation. The following lines of code takes 4 works to run 100 simulations. 
+After that, we will execute `one_sim()` multiple times using parallel computation. The following lines of code takes 2 works to run 100 simulations. 
 ```{r}
 set.seed(2025)
 
+plan("multisession", workers = 2)
 ans <- foreach(
   sim_id = seq_len(n_sim),
   .combine = "rbind",