add finalsize to setup page

Author: avallecam

learners/setup.md

@@ -107,6 +107,7 @@ if(!require("pak")) install.packages("pak")
 
 new_packages <- c(
   "socialmixr",
+  "finalsize",
   "epiverse-trace/epidemics",
   "scales",
   "tidyverse"
@@ -176,6 +177,7 @@ When the installation has finished, you can try to load the packages by pasting
 
 ```r
 library(socialmixr)
+library(finalsize)
 library(epidemics)
 library(scales)
 library(tidyverse)