Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: Do not use apex branch in promote gs path

    When we promote artifacts we do not want to include the apex branch (for
    example "gambia") in the gs path URL for where snapshots are uploaded.
    We may use a different apex branch to promote older OS versions of
    snapshots, but we still want a unified url of just
    apex/<os_version>/<topology> for our snapshot artifacts.

    Change-Id: I7dfe40558ce05d04e1805884cd6a47c82220581e
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e1f8f18..04e66d8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e1f8f186188b3d641abafa8970f40e585be96caf
+Subproject commit 04e66d80c9d2c6348f672bc6c90ea5bef9b0ffe4