doc: check failed for undocumented argument

Refs #28
2 jobs for 28-runmodel-uncoupling-of-hydrological-and-hydraulic-models in 3 minutes and 41 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Checks
passed check_as_cran #152389
docker

00:03:38

passed check_not_cran #152388
docker

00:03:41