Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: add euphrates stream to project jobs

    Change-Id: I2f6dbe545c1c1adaa0a7020440f17f6f0cf37973
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 53ba3fc..4e82569 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 53ba3fc16aa04a8f8f9a9bcb9dd2da9fc1f27510
+Subproject commit 4e825695aad58a6e020850d3b9c2c6189ebf1c6b