Update git submodules

* Update docs/submodules/yardstick from branch 'stable/fraser'
  - Merge "Bugfix: Yardstick GUI build fails on Fraser 6.1.0" into stable/fraser
  - Bugfix: Yardstick GUI build fails on Fraser 6.1.0

    Yardstick web GUI build fails due to angular version

    JIRA: YARDSTICK-1202

    Change-Id: Ie075d18cb2eac2070267759978cbdb7c784599ef
    Signed-off-by: rexlee8776 <limingjiang@huawei.com>
    (cherry picked from commit 81059ba8c7293a50aee72251afee89eb65547562)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 59931e1..461400f 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 59931e1276034e9304bc583e7f25518085a7ee3c
+Subproject commit 461400f3a0da8de762561677190e304aad07f94b