Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 3a6d8ecba65a9c99cd5c2542978465969ead1590
  - Check always returns true for install_plugin

    The [[ test for KUD_PLUGIN_ENABLED always returns true.
    Removed [[ to use the boolean operation instead.

    Issue-ID: MULTICLOUD-616
    Change-Id: I6bbd0c462ab7bb66447dec8dd16d786062a9c586
    Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index 3224842..3a6d8ec 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit 3224842f7f977041019cb5b2cccd3f86b5a38d9f
+Subproject commit 3a6d8ecba65a9c99cd5c2542978465969ead1590