add unrecommended to github download-button class

Author: jwcooper

_layouts/download.html

@@ -91,7 +91,7 @@ <h3>Past Releases</h3>
         the latest stable otherwise.
       </p>
       <div>
-          <a class="download-button" href="https://github.com/adafruit/circuitpython/releases">BROWSE GITHUB<i class="fab fa-github"></i></a>
+          <a class="download-button-unrecommended" href="https://github.com/adafruit/circuitpython/releases">BROWSE GITHUB<i class="fab fa-github"></i></a>
         <div class="clear"></div>
       </div>
     </div>