Rename index.html.html to index.html

Author: TheRobotCodingMan

index.html.html renamed to index.html

@@ -7,4 +7,4 @@
 <h1>Welcome to the <b><i>Playground</i></b></h1>
 <h2>Before we explore, let's understand the structure of the Playground</h2>
 </body>
-</html>
+</html>