Update git submodules

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

    JIRA: RELENG-254

    Change-Id: I5b9fe931e20a84d80d9ce6bc565bfee1db2dbc32
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a9ac5c3..0a53645 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a9ac5c36a91c3e11cdbea9e45cb2300e931f6126
+Subproject commit 0a53645f5a262d198d61da2eea9a7ef85a233c63