Rename items-json-generator.html to index.html

Changed name for GitHub pages usage. Thanks to Eckserah for the idea.

Author: AidansLab

items-json-generator.html index.htmlitems-json-generator.html renamed to index.html

@@ -705,4 +705,4 @@ <h1>Items.json Generator</h1>
     };
   </script>
 </body>
-</html>
+</html>