Fix sidebar information text visibility issue

_templates/forum.html

@@ -8,9 +8,9 @@
     </a>
 {% endif %}
 
-<div class="card text-white bg-light mt-4 text-center">
+<div class="card bg-light mt-4 text-center">
     <div class="card-body">
-      <p class="card-text">
+      <p class="card-text text-dark">
         <a href="https://www.beagleboard.org/">BeagleBoard.org</a> is all about being open, please discuss in public on our <a href="https://forum.beagleboard.org/">forum</a>!</p>
     </div>
 </div>
\ No newline at end of file