Fix bad NUX link in Legalpad search view

Summary:
See https://discourse.phabricator-community.org/t/clicking-the-create-a-document-button-on-fresly-installed-phabricators-legalpad-results-in-404/1088.

This URI isn't correct.

Test Plan: Visited Use Results → New User State in developer mode, clicked green button. Before: 404. After: taken to the edit screen.

Differential Revision: https://secure.phabricator.com/D19024