Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Fix Yamllint violations for jjb/dovetail"
  - Fix Yamllint violations for jjb/dovetail

    JIRA: RELENG-254

    Change-Id: I63bb14821b5d1798fccc313a07191e5f3dec160e
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4571595..528b700 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4571595d1a6a9a46b53e13c0b04ab20cb132c55d
+Subproject commit 528b700a091e7dd55d60728e1b63142fc4b66dac