Add required environment variable for CI

Author: jeremysmithco

.github/workflows/ci.yml

@@ -74,6 +74,7 @@ jobs:
       - name: Run tests
         env:
           RAILS_ENV: test
+          SUBMISSION_DEADLINE: "2099-01-01T00:00:00Z"
           # RAILS_MASTER_KEY: ${{ secrets.RAILS_MASTER_KEY }}
           # REDIS_URL: redis://localhost:6379/0
         run: bin/rails db:test:prepare test
@@ -102,6 +103,7 @@ jobs:
       - name: Run System Tests
         env:
           RAILS_ENV: test
+          SUBMISSION_DEADLINE: "2099-01-01T00:00:00Z"
           # RAILS_MASTER_KEY: ${{ secrets.RAILS_MASTER_KEY }}
           # REDIS_URL: redis://localhost:6379/0
         run: bin/rails db:test:prepare test:system