Update git submodules

* Update docs/submodules/yardstick from branch 'stable/danube'
  - Update release note for Danube.3.2

    Note: This patch should be merger to stable branch.

    Change-Id: I7f07a7c367fc387494f2313143a300fef85a8fd1
    Signed-off-by: JingLu5 <lvjing5@huawei.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 9f30327..e9338f2 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 9f303274516e43db97d065b9c6a9ac3980a2c0ce
+Subproject commit e9338f29a70a38a5838498adf79ec91f92d085d1