fix closing dd tag on ember quizzes show page

Change-Id: Icb00257a5ca2e995f7c002bf55368e4c541d9875
Reviewed-on: https://gerrit.instructure.com/32687
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Derek DeVries <ddevries@instructure.com>
Product-Review: Stanley Stuart <stanley@instructure.com>
QA-Review: Stanley Stuart <stanley@instructure.com>