Update git submodules

* Update docs/submodules/apex from branch 'stable/fraser'
  - Update Fraser 6.1 release notes

    Change-Id: I81b7337879260a0cfc7857608618d9149ca1db08
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index c5bafa1..a1f2e92 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit c5bafa166da6681c96a3c0d0e4b869621d52efd4
+Subproject commit a1f2e922d18430e064c9c8311f01ac2a0df19414