Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Remove download images logs (too verbose)"
  - Remove download images logs (too verbose)

    logs were used to troubleshoot Functest CI pipeline issue
    solved with [1]

    [1]: https://gerrit.opnfv.org/gerrit/#/c/40109/

    Change-Id: I56587f355c5e117efa8d0338204b0ced741477a7
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 82faf22..d9a30ea 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 82faf22321aa1edb1b1b773b582ffb43d3fe2e3f
+Subproject commit d9a30eaa7596f78ef06e496d579a25f63b011280