Fix #639: unused variable in website example (#640)

Fixes #639

Author: josdejong

website/pages/en/index.js

@@ -36,15 +36,15 @@ const codeExampleSmallScreen = `${pre}reason
 [@react.component]
 let make = (~name) =>
   <button>
-    {React.string("Hello!")}
+    {React.string("Hello " ++ name)}
   </button>;
 ${pre}`;
 
 const codeExampleLargeScreen = `${pre}reason
 [@react.component]
 let make = (~name) =>
   <button>
-    {React.string("Hello!")}
+    {React.string("Hello " ++ name)}
   </button>;
 ${pre}`;