Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Tagging Bottlenecks F release 6.2"
  - Tagging Bottlenecks F release 6.2

    Change-Id: I7df15a89379ce0e30eba0bd00ae9fbb76056970d
    Signed-off-by: Yang (Gabriel) Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 27a4d96..3e84747 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 27a4d9698aa9c64716547b62c2cfbbbeba1e44eb
+Subproject commit 3e847470acf5a37f6efb1c48627131f8dd9a5057