fix a typo in src/runtime/javascript/translator.html

src/runtime/javascript/translator.html

@@ -9,7 +9,7 @@
     <script type="text/javascript" src="translator.js"></script>
     <script type="text/javascript">
       /* CHANGE ME */
-     var grammar = Food;
+     var grammar = Foods;
 
      function updateTranslation () {
         var input = document.getElementById('inputText').value;