donttest container doesn't run donttest examples

According to the description, `donttest` containers should run Tests including \donttest examples, but it seems it doesn't. See commented lines at https://github.com/ropensci/osmdata/actions/runs/15858761034/job/44710456194#step:6:314 or https://github.com/ropensci/osmdata/actions/runs/15858761034/artifacts/3395034565 for a full inspection.