Merge "docs: change preview landing page top ribbon color" into mnc-io-docs
am: a138ad92b2

* commit 'a138ad92b299bf32a59ee5f4ba5a9e34e6998cb4':
  docs: change preview landing page top ribbon color

Change-Id: Ib7d5c3fc9a133ceb0a97f801218481a94fb15a47