Update Playground Instructions (#36)

* Update Playground to go to Hugging Face Spaces
* Updated Playground instructions

Author: sscargal

themes/memmachine/layouts/playground.html

@@ -38,7 +38,7 @@ <h2 class="title-2">How to Use the <span>MemMachine Playground</span></h2>
               </div>
             </li>
             <li class="mb-5">
-              <p>On the left, enter your Hugging Face API Token/Key to login</p>
+              <p>On the left, enter your Hugging Face API Token/Key to login. Your token must have READ access.</p>
             <img src="/img/HuggingFacePlaygroundAuth.png" alt="Hugging Face Authentication Token" style="width: 100%; max-width: 400px; margin-top: 10px; border-radius: 8px;" loading="lazy">
             </li>
             <li class="mb-5">