title: difference between "run |" and multiple runs in github actions
body: <p>what is the difference between</p>
  
  <pre><code>steps:
    - name: npm install, build, and test
      run: |
        npm ci
        npm run build --if-present
        npm test
  
  </code></pre>
  
  <p>and </p>
  
  <pre><code>steps:
    - name: npm install, build, and test
    - run: npm ci
    - run: npm run build --if-present
    - run: npm test
  </code></pre>
  
  <p>in github actions? 
  I tried to read the <a href="https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions#jobsjob_idsteps" rel="noreferrer">documentation</a> on steps but it does not mention anything like that</p>