title: Adding default reviewers to Github repository
body: <p>I followed the instructions here <a href="https://help.github.com/articles/about-codeowners/" rel="noreferrer">https://help.github.com/articles/about-codeowners/</a> but it doesn't seem to work. I even added the <code>CODEOWNERS</code> file at both the <code>root</code> and <code>.github</code> directory. The reviewers specified in the <code>CODEOWNERS</code> file are not selected automatically when a pull request is created. See screenshots below. Onyone who has set this up, could you point to where the problem is. Thank you.</p>
  
  <p><a href="https://i.stack.imgur.com/0OlpF.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/0OlpF.jpg" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/6ZAwE.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/6ZAwE.jpg" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/oJW7W.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/oJW7W.jpg" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/EF4tA.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/EF4tA.jpg" alt="enter image description here"></a></p>