Update git submodules

* Update docs/submodules/apex from branch 'stable/fraser'
  - Updates documentation for Fraser release

    Change-Id: I19bfaa5b2778baf458df60a4a53d135e57859e04
    Signed-off-by: Tim Rozet <trozet@redhat.com>
    (cherry picked from commit 22bc385f5b2e25694699a614268aaad2fdacbb12)

diff --git a/docs/submodules/apex b/docs/submodules/apex
index f8fd162..283bb98 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit f8fd162ac74c83cd972311ee152b09bad6312999
+Subproject commit 283bb98ae05b77979f00716d3c9cd3fff6af3651