Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 75afe2e559a170f5cae7e870059db0438e02aa4b
  - Merge "Improve provisioning central IP address for ovn tests"
  - Improve provisioning central IP address for ovn tests

    Function responsible for providing central ovn address has been
    corrected to utilize already configured address instead of
    checking it each time. Error reporting within the same function
    has been also corrected and improved as well as iproute package
    became used for address determining instead of net-tools' ifconfig

    Issue-ID: MULTICLOUD-686

    Signed-off-by: Konrad Bańka <k.banka@samsung.com>
    Change-Id: I156297098b7919471df711f049f0d9439bd81420

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index acf41fc..75afe2e 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit acf41fcb3b1cc3e2746c6171efc6389b1fc19377
+Subproject commit 75afe2e559a170f5cae7e870059db0438e02aa4b