Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: Add allinone snapshot job

    Job will allow us to promote all-in-one snapshots.

    Change-Id: I0d0bec8e7598219e17df32bb05a4e8d6efbc52dd
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index c1ac5fa..1223396 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit c1ac5fa5a2633dc7a4b08036e0e8bbbf53794d85
+Subproject commit 1223396e23e07d57fe0d04a2c40cedc460513f1d