Update git submodules

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

    JIRA: RELENG-254

    Change-Id: I9391e0537d2c0904daa966f56d99c96d445d00d9
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 335d549..bfc9261 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 335d54976c2d9330b7377c0dd07f06d0d78fbf80
+Subproject commit bfc9261538b93578e64c54f9daf0d0d9758d0dec