Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: add ramdisk and kernel to upload

    Change-Id: I81e89f9fe313977d6a06c6283cc5301f672a77c3
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 00f3a6a..93c0193 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 00f3a6a8f37f1ee4ddfb7f24f0cf9bb4e3b124c1
+Subproject commit 93c01936bbd57752820bcf22078c8268677dafe1