Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: Bump OSA and bifrost SHAs

    This change
    - bumps OSA SHA to cbfdb7dc295ff702044b807336fab067d84a3f20
        (mostly based on Rocky RC1)
    - bumps bifrost SHA to c1c6fb7487d5b967624400623fd35aabf303b917
    - pins Ansible to 2.4.6.0
    - switches to ollivier/functest-healtcheck since OS is bumped to Rocky

    Change-Id: Icc14e3e794b489dafd78b426c54051a3732ccb1a
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index c1ef2d4..9739204 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit c1ef2d45fe71dda92ec2f015b2ccd70ce2855d85
+Subproject commit 973920421d98159a3d91790859061ee718cd1e07