title: Asdf wont switch local version based on tool-versions or using the local command
body: <p>I downloaded asdf the other day and am trying to use it with a ruby on rails project I downloaded from Github.
  When I run <code>asdf install</code>, I get this response:</p>
  <pre><code>firebase 9.10.0 is already installed
  ruby 2.7.2 is already installed
  </code></pre>
  <p>Then I run <code>rails s</code> :</p>
  <pre><code>No preset version installed for command rails
  Please install a version by running one of the following:
  
  asdf install ruby 2.7.2
  
  or add one of the following versions in your config file at 
  /Users/******/Desktop/****/.tool-versions
  ruby 3.0.1
  </code></pre>
  <p>The project runs on ruby 2.7.2.</p>
  <p>.tool-versions:</p>
  <pre><code>ruby 2.7.2
  node 12.18.3
  </code></pre>
  <p>I installed asdf with homebrew and use oh-my-zhs with the asdf plugin.</p>
  <p>EDIT:
  running</p>
  <pre><code>asdf install ruby 2.7.2
  </code></pre>
  <p>just says</p>
  <pre><code>ruby 2.7.2 is already installed
  </code></pre>