title: Format for a deep link in Slack
body: <p>I have some webhooks setup on a few slack channels. I want them to post deep links to other apps that people can click on when they are using Slack on their mobile device. The format for a regular link is </p>
  
  <pre><code>&lt; url | display_name &gt; (in String form)
  </code></pre>
  
  <p>but that doesn't work for deep links. Any help would be greatly appreciated. Thanks!</p>