
Updated main docs landing page with R4 links
Updated Installation index page: promote R4 to supported, archive R3,
and added R5 (latest) folder.
Depends-On: https://review.opendev.org/742989
Change-Id: Ie8b918c2537def374de5cf6aeb0105e595ef5978
Signed-off-by: MCamp859 <maryx.camp@intel.com>
(cherry picked from commit 59426f4afc
)