point the to MDN submit page docs

I couldn't find anything good, to be honest with you more I looked at this link, the more I think it should be removed. There are at least 2 other spots on this page to get to the documentation including the words "Documentation" and "API Reference".

I just asked MDN for the number of hits from this link and in the last month there has been 296 for submitting and app and 83 for submitting a packaged app. That's out of 4,811 views of this page. So that's 5.4% for the first link and 1.7% for the second link.