Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 5509a0efa0b8c8ebb832ae2bef73dc53ee14e582
  - Merge "[fuel] Add jobs for itri-pod1 deployments"
  - [fuel] Add jobs for itri-pod1 deployments

    Change-Id: Ic2d88258265659dd01894920c7aff8f3de1a8a10
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d163f05..5509a0e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d163f05fae737cd45250b4a7214812ba6172cbe9
+Subproject commit 5509a0efa0b8c8ebb832ae2bef73dc53ee14e582