[FIX] Execute command fix

[odarotto]

When running pipelines steps like:

    - name: use-results
      stage: 2
      reference:
        sum: ${{pipeline.use-function.work.results.sum}}
        product: ${{pipeline.use-function.work.results.product}}
      work:
        command: ["echo ${{reference.sum}} && echo ${{reference.product}}"]

Workflow gives error when executing the command