i18n: fix `time: event:` for Icelandic
i18n: fix `time: event:` for Icelandic

Per customer feedback we are changing:
- FROM: time: event: "%{date} á %{time}"
- TO: time: event: "%{date} kl. %{time}"

refs TRANSLATE-1163
flag = none

test plan: time events are translated correctly

Change-Id: I282f00ee5afc2500f7cd24cf0725315bad38a12a
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/279852
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>

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