Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Change the installer ip of daisy-baremetal

    From 10.20.11.2 to 10.20.7.3

    Change-Id: I796e2bcf3065df804eefec28c2ed9ecdcb198d7a
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4c0f6bc..bb24c3d 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4c0f6bcadfb6b323505a6dfa719eca3832a6f127
+Subproject commit bb24c3d6c42c7b74ae8ea2fb9f390ff1f7fd7dbf