HOTFIX: Handle no open conference CFPs found edge case

[alysivji]

What does this do

• fix error when we have no upcoming conference CFPs

Why are we doing this

Ensure the app does not error out when looking for new CFPs

How should this be tested

Wrote up a unit test; tested on my development slack instance

Migrations

n/a

Dependencies

n/a

Callouts

n/a