Change navbar Docs URL to global Docs link
li.main-nav--link
a.community href="https://community.chef.io/products/chef-habitat/" Chef Habitat
li.main-nav--link
- a.docs href="/docs" Docs
+ a.docs href="https://docs.chef.io/" target="_blank" Docs
li.main-nav--link
a.learn href="https://learn.chef.io/" target="_blank" Learn Chef
li.main-nav--link
