docs(vignette): adding caramel for multiobjective optimization

Status Job ID Name Coverage
  Build
failed #125022
build_patched

00:00:24

 
  Tests
skipped #125024
check_as_cran_patched
skipped #125023
check_not_cran_patched
 
Name Stage Failure
failed
build_patched Build
  impossible d'établir une connexion avec l'affichage X11 ''
--- finished re-building ‘V05_sd_model.Rmd’

SUMMARY: processing the following file failed:
‘V02.1_param_optim.Rmd’

Erreur : Vignette re-building failed.
Exécution arrêtée
ERROR: Job failed: exit status 1