Update index.html

Author: none-None1

index.html

@@ -39,6 +39,7 @@ <h3>Welcome to Interpret Esolangs Online</h3>
     <script defer src="quine.js"></script>
     <script defer src="rbf.js"></script>
     <script defer src="reversefuck.js"></script>
+    <script defer src="six.js"></script>
     <script defer src="smbf.js"></script>
     <script defer src="smbf_sharp.js"></script>
     <script defer src="text.js"></script>