Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 56b6d5b88e4c5c8db7a6fbc8da113a7a205d44ae
  - Fix the Multus Baremetal containerization testing

    - interface name will be different in each Baremetal
    - Multus testing good for Vagrant and AIO testing only

    Issue-ID: MULTICLOUD-1037
    Co-authored-by: yu marin <weifei.yu@intel.com>
    Signed-off-by: Kuralamudhan Ramakrishnan <kuralamudhan.ramakrishnan@intel.com>
    Change-Id: I50786f07f0dbd9aadffda69d02597c85e2675203

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index 402c6e9..56b6d5b 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit 402c6e98bfc6c881dceb65ce2756ea94834c70ef
+Subproject commit 56b6d5b88e4c5c8db7a6fbc8da113a7a205d44ae