DOC verify build changed to use now python3
Issue-ID: CIMAN-335
Issue: IT-18845

Signed-off-by: andreasgeissler <andreas-geissler@telekom.de>
Change-Id: I6ef362fd210a6b57afc8c5f4f5b77f1951f6f0f2
diff --git a/jjb/doc/doc-templates-rtd.yaml b/jjb/doc/doc-templates-rtd.yaml
index 234a767..be97b29 100644
--- a/jjb/doc/doc-templates-rtd.yaml
+++ b/jjb/doc/doc-templates-rtd.yaml
@@ -71,7 +71,7 @@
       - shell: !include-raw: doc-install-plantuml.sh
       - shell: |
           #!/bin/bash
-          virtualenv $WORKSPACE/venv-tox
+          python3 -m venv $WORKSPACE/venv-tox
           source $WORKSPACE/venv-tox/bin/activate
           pip install --upgrade pip
           pip install --upgrade tox argparse