Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Deprecates the use of '--upstream' argument

    We only support the use of upstream deployments from Gambia onwards.
    Therefore deprecating the parameter and forcing upstream to always be
    used.

    Change-Id: I7926a65a2c32bca2272855ba45fdb6005f67616f
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 6cb6b37..107c1c3 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 6cb6b372fc0f74daf952e04b9d5712c6930cee42
+Subproject commit 107c1c3d73ee689eb09ae8851e3048428456fe2e