Add chromeos-octopus-chrome-skylab-fyi builder to chromeos.fyi

BUG=b:271205369
TEST=none

Change-Id: I252838d0e8df94fe5ef5571c2b7c85c9ae76d547
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4337121


Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1118499}