Update index.html (#5578)

Added Gamaddy

index.html

@@ -1194,6 +1194,10 @@ <h1>Projects Using Ace</h1>
                                     <img lazy-src="https://xuantuyen.education/assets/img/logo.png" style="width: 85px; left: 7px; top: -7px;">
                                     <a href="https://www.xuantuyen.education/">XUÂN TUYẾN Education</a>
                                 </li>		
+				<li>
+                                    <img lazy-src="https://gamaddy.com/gamaddy.png" style="width: 85px; left: 7px; top: -7px;">
+                                    <a href="https://gamaddy.com/">Gamaddy</a>
+                                </li>
                                 <li id="add_your_site">
                                     <p>+</p>
                                     <a href="https://github.com/ajaxorg/ace/issues/new?assignees=&labels=website%2Cneeds-triage&projects=&template=add-to-website.yml&title=Add+project+%28project+name%29+to+the+list+of+projects+using+Ace+on+its+website">Your Site Here</a>