software/jupyter: Fix jupyter notebook config file

4 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.SlapRunner.ResilienceTest-Master

00:23:43

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:29:20

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

08:32:49

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

04:37:36