Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: Fix usage of gpg key import

    Removes using source to call the gpg import script. source will execute
    the script in the current shell, which will exit the artifact upload.
    Adds checking to make sure we ignore any failure with running the
    script.

    Change-Id: I587cf9584f9fa8c4d315b7b2328a6c7c55ae3b88
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0f74128..4c34259 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 0f74128709ef7f1840ee2af673067c3712f2393b
+Subproject commit 4c34259866bd34d79fb5a100b8355404d9eca36a