Update git submodules

* Update docs/submodules/releng from branch 'master'
  to a39dcbab37a210cf12b2b1e4aa1d1636c89fd292
  - Merge "Run tempest_cyborg if kali"
  - Run tempest_cyborg if kali

    https://gerrit.opnfv.org/gerrit/c/functest/+/70553

    Change-Id: I95fd86104906df65155f42e2639b6eb6738ab592
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8173fdf..a39dcba 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8173fdf460ec80c1f3bf280e02fb9e6b53403580
+Subproject commit a39dcbab37a210cf12b2b1e4aa1d1636c89fd292