added github link

Author: AwMan3703

index.html

@@ -105,7 +105,9 @@
 
                         <div id="clientInfo-wrapper">
                             <span id="author">creato da <a href="https://twitter.com/Aw_Man3704" target="_blank">@AwMan3704</a></span>
-                            <a href="commitLog.html" target="_blank">Aggiornamenti</a>
+                            <span>
+                                <a class="link-preview" href="https://github.com/AwMan3703/art-cheatsheet-maker">GitHub</a> • <a href="commitLog.html" target="_blank">Contribuzioni</a>
+                            </span>
                             <span id="version">versione sconosciuta</span>
                         </div>
                     </div>