fix translation of Quizzes.Next feature name
fix translation of Quizzes.Next feature name

this looks like a string key to i18nliner, resulting in a
"missing translation: en.Quizzes.Next" error on the features page.

use an explicit key to remedy this.

test plan: the name of the Quizzes.Next feature should be
"Quizzes.Next"

fixes ADMIN-2664

Change-Id: I700624c6d813ccbd66e22e3fffc0364a74d9655a
Reviewed-on: https://gerrit.instructure.com/193856
Tested-by: Jenkins
Reviewed-by: James Williams <3a5f4ed991dbfa5c9ef76ad729d240ca12f62180@instructure.com>
QA-Review: Mysti Lilla <431d062aff1e8f25416b3a7b732fe6effdb03f9a@instructure.com>
Product-Review: Mysti Lilla <431d062aff1e8f25416b3a7b732fe6effdb03f9a@instructure.com>

djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms