Intermittent testing failures on neuprint_ROI_connectivity

[romainFr]

Testing occasionally (on the first build of a commit/PR ?) fails on that line:

test-roi.R:29: error: neuprint_ROI_connectivity works
neuPrint error: 
Backtrace:
 1. testthat::expect_is(...) tests/testthat/test-roi.R:29:2
 4. neuprintr::neuprint_ROI_connectivity(rois, full = F)
 5. neuprintr::neuprint_fetch(...) R/roi.R:116:4
 6. neuprintr::neuprint_error_check(req) R/fetch.R:15:2

Not sure what's that about but keeping a note of it here.