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/eb678fd394874236a54e18408506234b

:heavy_check_mark: build-otc-api-ref SUCCESS in 4m 02s :heavy_check_mark: noop SUCCESS in 0s :heavy_check_mark: otc-tox-docs SUCCESS in 11m 53s