fixes typo in report description

fixes CNVS-11646

test plan
 - specs should pass

Change-Id: I6a598ad7fde9825b30265d980c1d5e0ffb3fd4a1
Reviewed-on: https://gerrit.instructure.com/31358
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Cody Cutrer <cody@instructure.com>
Product-Review: Rob Orton <rob@instructure.com>
QA-Review: Rob Orton <rob@instructure.com>