Update cloud-storage.rst (#5719)
Update cloud-storage.rst (#5719)

* Update cloud-storage.rst

Microsoft released a new version with breaking changes in late 2019. Rasa uses the legacy version, so we need to tell users how to access the legacy version. Until the persistor is updated to the new version, of course.

* Update docs/user-guide/cloud-storage.rst

Co-authored-by: Tobias Wochinger <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@tobias-wochinger.de>

Co-authored-by: Tobias Wochinger <5ab5657415213e16a8561b9cb7fb27e3a8c539ed@rasa.com>
Co-authored-by: Tom Bocklisch <96835dd8bfa718bd6447ccc87af89ae1675daeca@rasa.com>
Co-authored-by: Tobias Wochinger <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@tobias-wochinger.de>
Co-authored-by: Roberto <e5957646e01fbf087d771b1d4b0e7c660696927b@users.noreply.github.com>
RasaHQ/rasa_nlu,RasaHQ/rasa_nlu,RasaHQ/rasa_nlu