only test on 3.11

Jenkinsfile

@@ -7,6 +7,6 @@ library 'SWDPipeline'
 // python_test_versions (list of python versions, resolving to docker tags, to test against)
 String name = 'brian-dashboard-manager'
 List<String> extraRecipients = ['bjarke@nordu.net', 'erik.reid@geant.org', 'sam.roberts@geant.org', 'pelle.koster@geant.org']
-List<String> pythonTestVersions = ['3.6', '3.11']
+List<String> pythonTestVersions = ['3.11']
 
 SimplePythonBuild(name, extraRecipients, pythonTestVersions)