title: Bundler attempted to update rails but its version stayed the same
body: <p>I'm trying to update the rails 5.0.7 to 5.2 but it is showing that </p>
  
  <pre><code>Bundler attempted to update rails but its version stayed the same
  </code></pre>
  
  <p>the command which I tried to update are:-</p>
  
  <pre><code>rails app:update
  </code></pre>
  
  <p>but it is not updating the rails even I tried running the below code </p>
  
  <pre><code>bundle update rails
  </code></pre>