software/jstestnode: fixup typo

Missing trailing /

See 5e1ff2de
7 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

00:41:04

passed SlapOS.Eggs.UnitTest-Master.Python2

00:12:14

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:37

passed SlapOS.KVM.ResilienceTest-Master

00:20:20

passed SlapOS.SlapRunner.ResilienceTest-Master

00:23:56

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

01:43:07

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

00:33:05