title: github API check_runs returning 415, "Unsupported Media Type"
body: <p>really that simple, making a request with github api: <a href="https://docs.github.com/en/rest/reference/checks#list-check-runs-for-a-git-reference" rel="nofollow noreferrer">https://docs.github.com/en/rest/reference/checks#list-check-runs-for-a-git-reference</a></p>
  <p>I am trying to find the check runs for a particular branch I have. Below is the url I GET from:</p>
  <pre><code>url = ...api/v3/repos/{repo_fullname}/commits/{branch}/check-runs'
  </code></pre>
  <p>Here are my headers:</p>
  <pre><code>    headers = {
          'Authorization': 'token ' + token,
          &quot;Accept&quot;: &quot;application/vnd.github.v3+json&quot;
      }
  </code></pre>
  <p>I get hit with the: 415 Client Error: Unsupported Media Type for url...</p>
  <p>Please help, been banging my head for hours. Thanks!</p>