Update index.html additional link to SylUI Introduction

Author: GregTonoski

index.html

@@ -191,7 +191,7 @@
         <p>More information:
           <ul>
             <li>
-            <a href="https://docs.google.com/presentation/d/e/2PACX-1vRVNGfx9-cq6i1iKlSp0u0kYZPHZJSPxsfpFtgScQA3QG6lJCqOE7kFHd5stL1-wnyDlqhRJU0TFbv8/pub?start=false&loop=false&delayms=3000">SylUI introduction</a>
+            <a href="https://docs.google.com/presentation/d/e/2PACX-1vRVNGfx9-cq6i1iKlSp0u0kYZPHZJSPxsfpFtgScQA3QG6lJCqOE7kFHd5stL1-wnyDlqhRJU0TFbv8/pub?start=false&loop=false&delayms=3000">SylUI introduction (Google Docs)</a> or <a href="https://github.com/GregTonoski/sylui/raw/refs/heads/main/doc/SylUI_introduction_by_Greg_Tonoski_(Nostriga%202024).pptx">SylUI Introduction (GitHub)</a>,
             </li>
             <li>
             <a href="https://github.com/GregTonoski/sylui">https://github.com/GregTonoski/sylui</a>
@@ -203,3 +203,4 @@
 </html>
 
 
+