Fix #247 issue linking to Tic Tac Toe

Inside Tic Tac Toe folder there was html file but while linking, php files was used in the index.html.

index.html

@@ -111,7 +111,7 @@ <h1 class="text-uppercase Heading"> <span class="badge">small javascript project
       Generator</a>
     <a href="./Simon_Game/index.html" class="hvr-sweep-to-right projectsName">Simon Game</a>
     <a href="./Snake Game/index.html" class="hvr-sweep-to-right projectsName">Snake Game</a>
-    <a href="./Tic Tac Toe/tictactoe.php" class="hvr-sweep-to-right projectsName">Tic Tac Toe</a>
+    <a href="./Tic Tac Toe/tictactoe.html" class="hvr-sweep-to-right projectsName">Tic Tac Toe</a>
     <a href="./Text-to-Speech/index.html" class="hvr-sweep-to-right projectsName">Text to Speech Convertor</a>
     <a href="./Timer/timer.html" class="hvr-sweep-to-right projectsName">Timer</a>
     <a href="./To Do List/todolist.html" class="hvr-sweep-to-right projectsName">To Do List</a>