Update git submodules

* Update docs/submodules/openretriever from branch 'master'
  - Merge "Markup corrections to the Kubernetes gap analyzis"
  - Markup corrections to the Kubernetes gap analyzis

    Some fixes to the markup in the table.
    I've moved CNF to the main text to the multi network row,
    as it is not an implementation option.

    Change-Id: I97193a9494b1a018aeaca75b3b90d2e240b2f2b7
    Signed-off-by: csatari <gergely.csatari@nokia.com>

diff --git a/docs/submodules/openretriever b/docs/submodules/openretriever
index 06a8a25..d2e76f3 160000 (submodule)
--- a/docs/submodules/openretriever
+++ b/docs/submodules/openretriever
@@ -1 +1 @@
-Subproject commit 06a8a257b5040f619ddbe991f253417e07a0ffb7
+Subproject commit d2e76f3f7ae0d7da12f054cecddfbd344801ddc5