Update data column descriptors for Italian dataset

renku dataset unlink -I dati-* covid-19-italy

renku dataset: committing 3 newly added files

renku dataset add covid-19-italy /Users/ableuler/tmp/dati-andamento-nazionale-description.json /Users/ableuler/tmp/dati-province-description.json /Users/ableuler/tmp/dati-regioni-description.json