Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Set aarch64 deploys to UEFI"
  - Set aarch64 deploys to UEFI

    Change-Id: I6b037ccd38fa68e5f863566a1c9a3ed4399bab84
    Signed-off-by: Dan Radez <dradez@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 9462517..d76b7e5 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 946251720965cd5da9f6798d3ff931950524dd24
+Subproject commit d76b7e53517116a4b5cbe10dbf69a1a82e9b9a41