Update git submodules

* Update docs/submodules/releng from branch 'master'
  - [armband] Reschedule dovetail CI jobs for weekend

    Dovetail does not currently support AArch64 properly (e.g. it tries
    to load x86 images), so limit its runs to weekend days until full
    support is implemented.

    Change-Id: I83347286490344912593a122fc47013d5fcf7125
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 198850d..63b16b6 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 198850dce3d103ce6f04d90f86a5c9dfca364a79
+Subproject commit 63b16b648cf32af6917d9a1ad419273430ff5db8