Update link to GitHub

luhn-algorithm/index.html

@@ -85,7 +85,7 @@
                     <p id="validation_message"></p>
 
                     <!-- link to source code on GitHub -->
-                    <a href="https://github.com/mgrove36/mgrove36.github.io/blob/master/luhn-algorithm/index.html" class="source-code-link mdc-fab mdc-fab--extended"></a>
+                    <a href="https://github.com/mgrove36/demo-code/blob/master/luhn-algorithm/index.html" class="source-code-link mdc-fab mdc-fab--extended"></a>
                 </div>
             </main>
         </div>