Fixing e2e demo

Author: s1hofmann

.github/workflows/snapshot_release.yaml

@@ -42,7 +42,10 @@ jobs:
         if: ${{matrix.os == 'ubuntu-latest'}}
         run: docker exec nut-ci bash -c "bash $PWD/.build/build.sh ${PWD} ${{matrix.node}}"
       - name: Upload screenshot
-        if: ${{cancelled() && matrix.os == 'ubuntu-latest' && matrix.node == '15'}}
+        if: |
+          ${{ matrix.os == 'ubuntu-latest' }} &&
+          ${{ matrix.node == '15'}} &&
+          ${{ failure() }}
         uses: actions/upload-artifact@v2
         with:
           name: Container UI