Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 99d4574f6385666f21d5c31fd0e9046a2ab509ef
  - Merge "Helm chart to deploy Istio-operator"
  - Helm chart to deploy Istio-operator

    Istio-operator is required to manage the
    lifecycle and deployments of Istio

    Issue-ID: MULTICLOUD-710

    Signed-off-by: Pramod <pramod.raghavendra.jayathirth@intel.com>
    Change-Id: Ifd2d05e790148096b5c0b454208e233aa5a299f9

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index eb950b3..99d4574 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit eb950b3aa170a208fbf1ea5484029118d5d1d754
+Subproject commit 99d4574f6385666f21d5c31fd0e9046a2ab509ef