Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: changes build job to use git-scm-gerrit

    Change-Id: I2701ecea73ae58dc6115a93cbfc8b35ef7949b3b
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4860337..c6222bd 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 48603379051c10c4f956a9a1863b169deacbbd04
+Subproject commit c6222bda887a22bf40e7c062b727d33b24e1f1e8