title: Updating my google play "What's new" section
body: <p>I am about to release an update for my companies android app. The previous guy who wrote the app has now left, and I was just wondering how I change what appears in the What's New section in google play.</p>
  
  <p>I can't find any guides anywhere!? I read somewhere it's to do with a changelog?? But is that something I should've compiled within the apk? Is it something I should upload separately to the developer console?</p>
  
  <p>Thanks</p>