Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "snaps: Disable snaps verify jobs to prevent jobs queueing up"
  - snaps: Disable snaps verify jobs to prevent jobs queueing up

    The POD, intel-pod20, where the slave was located doesn't exist
    anymore so we have no possibility to run snaps-verify jobs for
    the timebeing.

    This will be looked into once we have a new slave setup.

    Change-Id: Ib46ccf160cd6895aa65d6a136afeedd2f7300335
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f4883a2..a6ad912 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f4883a21eadcc5c8b87209617cfe823da6869cc8
+Subproject commit a6ad912d1f7ec888a077615f3ae14efa51931dc3