message: Fixed typo in Java/C# tutorial.
diff: @@ -1501,7 +1501,7 @@ like so:
  // The number of bytes is buf.remaining().
  // Alternatively this copies the above data out of the ByteBuffer for you:
  - bytes[] buf = builder.sizedByteArray();
  + byte[] buf = builder.sizedByteArray();
  ~~~
  </div>
  <div class="language-csharp">
  @@ -1513,7 +1513,7 @@ like so:
  // buf.Length - buf.Position.
  // Alternatively this copies the above data out of the ByteBuffer for you:
  - bytes[] buf = builder.SizedByteArray();
  + byte[] buf = builder.SizedByteArray();
  ~~~
  </div>
  <div class="language-go">
  