Update git submodules

* Update docs/submodules/openretriever from branch 'master'
  - Add ruijing.guo@intel.com as a commiter for OpenRetriever

    Change-Id: I341d84387842504953a0109376e0f951a9f7c6c1
    Signed-off-by: Xuan Jia <jason.jiaxuan@gmail.com>

diff --git a/docs/submodules/openretriever b/docs/submodules/openretriever
index 0f93186..06a8a25 160000 (submodule)
--- a/docs/submodules/openretriever
+++ b/docs/submodules/openretriever
@@ -1 +1 @@
-Subproject commit 0f93186dcabb017dd80271af0e60d3eb37fcedcf
+Subproject commit 06a8a257b5040f619ddbe991f253417e07a0ffb7