[1.8.x] Bumped django_next_version in docs config.
[1.8.x] Bumped django_next_version in docs config.

pquentin/django,pquentin/django,h4r5h1t/django-hauthy,pquentin/django,h4r5h1t/django-hauthy,h4r5h1t/django-hauthy,h4r5h1t/django-hauthy