Update git submodules

* Update docs/submodules/edgecloud from branch 'master'
  - Merge "Correction to the Edge Structure figure"
  - Correction to the Edge Structure figure

    A typo is corrected in the figure and the source ppt file added.

    Change-Id: Icf81090aae9d998365e0bdce5e33cb20db751cc7
    Signed-off-by: Gergely Csatari <gergely.csatari@nokia.com>

diff --git a/docs/submodules/edgecloud b/docs/submodules/edgecloud
index a1ebe86..6c5b926 160000 (submodule)
--- a/docs/submodules/edgecloud
+++ b/docs/submodules/edgecloud
@@ -1 +1 @@
-Subproject commit a1ebe867602aa5de250628f876ce1e82028fc459
+Subproject commit 6c5b92602fb5dc549941e66557f1369093d459b4