title: Workflow is not shown so I cannot run it manually (Github Actions)
body: <p>I created the workflow <code>Test</code> but there is no <code>Run workflow</code> button to run it manually.</p>
  <p><a href="https://i.stack.imgur.com/xaBQ6.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xaBQ6.png" alt="enter image description here" /></a></p>
  <p>This is my <code>test.yml</code> file. Is there anything missing?</p>
  <pre><code>name: Test
  
  on:
    release:
      types: [created]
    
  jobs:
    build:
      runs-on: ubuntu-latest
  
      steps:
        - uses: actions/checkout@v2
  
        - name: Run a one-line script
          run: echo Hello, world!
  </code></pre>