spec: fix failing selenium spec for numeric quiz type
spec: fix failing selenium spec for numeric quiz type

fixes CNVS-15712
TEST PLAN
 Run Specs

Change-Id: I307ef083c2910df0fd73871ce2a342830d9c4d78
Reviewed-on: https://gerrit.instructure.com/45068
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Derek DeVries <ff87a0776152510efd53bb1f4ea089dbbc90e730@instructure.com>
QA-Review: Derek DeVries <ff87a0776152510efd53bb1f4ea089dbbc90e730@instructure.com>
Product-Review: Derek DeVries <ff87a0776152510efd53bb1f4ea089dbbc90e730@instructure.com>

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