Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Fix the misspelling"
  - Fix the misspelling

    There is a mistake spelling about slave name,
    the job cannot assign to correct slave.

    Change-Id: I001ec82a30c6f33dd42795cbe990bfb5c2da9740
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 24d66cb..15ce869 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 24d66cbb2c7974b021df04543e68963a7c5a20c5
+Subproject commit 15ce86943f97857173114fca89246b1cbba1925e