make bytes defined for PushMessageData

Author: marcoscaceres

index.html

@@ -1540,7 +1540,7 @@ <h2>
         };
       </pre>
       <p>
-        {{PushMessageData}} objects have an associated <dfn>bytes</dfn> (a [=byte sequence=]),
+        {{PushMessageData}} objects have an associated <dfn data-dfn-for="PushMessageData">bytes</dfn> (a [=byte sequence=]),
         which is set on creation.
       </p>
       <p>