Update tox.ini && conf.py file

[vladimirhasko]

Performed-by: gitea/infra/otc-metadata/tools/generate_doc_confpy.py

[otc-zuul[bot]]

Build succeeded. https://zuul.otc-service.com/t/eco/buildset/3d685c65420c437583fe71b1ec0e922f

:heavy_check_mark: noop SUCCESS in 0s :heavy_check_mark: otc-tox-docs SUCCESS in 12m 49s