[1.6.x] Fixed incorrect filter name in docs/topics/i18n/translation.txt.
[1.6.x] Fixed incorrect filter name in docs/topics/i18n/translation.txt.

Backport of 38fc463fbfb9b74c38f1e8c33e4c99bc2274a880 from master

django-nonrel/django,django-nonrel/django,redhat-openstack/django,felixjimenez/django,django-nonrel/django,redhat-openstack/django,felixjimenez/django,felixjimenez/django,redhat-openstack/django,felixjimenez/django,redhat-openstack/django,django-nonrel/django