add missing description for ungraded timespan alerts, refs #4317
add missing description for ungraded timespan alerts, refs #4317

Change-Id: Ifd9e1bddb2f8d4b93f21d8f5e5d40f5a41563525
Reviewed-on: https://gerrit.instructure.com/7335
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Brian Whitmer <760e7dab2836853c63805033e514668301fa9c47@instructure.com>

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