fix minor misspelling

Change-Id: I802de01b5d80abb4dd09d9d05a625923db6b48dc
Reviewed-on: https://gerrit.instructure.com/34335
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Sterling Cobb <sterling@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>
QA-Review: Ryan Shaw <ryan@instructure.com>