Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Missing brackets on x86_64 conditional

    Change-Id: I5436317075ceffa18c34e213795ed3816627d121
    Signed-off-by: Dan Radez <dradez@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 586110a..89bffdb 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 586110a27dc11e89a5ff3552f3215e8a0716aa92
+Subproject commit 89bffdb811f8ca932ff13ed92f5f3b64f1b66277