Create `releases` or `upgrade` button on main page

[lifeart]

Problem:

each time when I want to update ember-cli I do:

• go to ember-cli.com
• • struggle to find a step-by-step upgrade guide
• go to google.com
• • type "ember cli update",
• • clicking on second search result
• • profit!

https://github.com/ember-cli/ember-cli/releases

How it may be:

• go to ember-cli
• click on 'updates' button

[lolmaus]

Actually, there is a valid path on ember-cli.com. Starting on the root page:

• Guide
• Upgrading
• release notes for each release

If you already know that step-by-step release guides are on GitHub, you can take a shorter path. Starting on ember-cli.com root page:

• Contributing (takes you to GitHub)
• Releases

But if you're really desperate, you can simply click the version number, which takes you directly to releases:

[lifeart]

@lolmaus thank you for this findings! I'm think it will be better to highlight Version 3.1.1 as link or create small text near Version 3.1.1 -> Version 3.1.1 notes