Merge pull request #4460 from consul/failure_screeshots

Upload screenshots of failures with GitHub Actions

.github/workflows/tests.yml

@@ -49,3 +49,9 @@ jobs:
           KNAPSACK_PRO_FIXED_QUEUE_SPLIT: true
           KNAPSACK_PRO_LOG_LEVEL: info
         run: bin/knapsack_pro_rspec
+      - name: Upload screenshots
+        if: failure()
+        uses: actions/upload-artifact@v2
+        with:
+          name: screenshots
+          path: tmp/screenshots